{| class="infobox" style="width: 20em;"
|-
! colspan="2" style="text-align:center; font:10em verdana; background:#ccc;"| 7
|-
| colspan="2" |
|-
| Cardinal

Cardinal number

In mathematics, cardinal numbers, or cardinals for short, are a generalization of the natural numbers used to measure the cardinality of sets. The cardinality of a finite set is a natural number – the number of elements in the set. The transfinite cardinal numbers describe the sizes of infinite...

| 7
seven
|-
| Ordinal

Ordinal number (linguistics)

In linguistics, ordinal numbers are the words representing the rank of a number with respect to some order, in particular order or position . Its use may refer to size, importance, chronology, etc...

| 7th
seventh
|-
| Numeral system

Numeral system

A numeral system is a writing system for expressing numbers, that is a mathematical notation for representing numbers of a given set, using graphemes or symbols in a consistent manner....

| septenary

Septenary

The septenary numeral system is the base- number system, and uses the digits 0-6.-Multiplication table:-Fractions:Fractions expressed in septenary will repeat a sequence of digits unless the denominator is a power of seven...

|-
| Factorization

Factorization

In mathematics, factorization or factoring is the decomposition of an object into a product of other objects, or factors, which when multiplied together give the original...

| prime

Prime number

A prime number is a natural number greater than 1 that has no positive divisors other than 1 and itself. A natural number greater than 1 that is not a prime number is called a composite number. For example 5 is prime, as only 1 and 5 divide it, whereas 6 is composite, since it has the divisors 2...

|-
| Divisor

Divisor

In mathematics, a divisor of an integer n, also called a factor of n, is an integer which divides n without leaving a remainder.-Explanation:...

s
| 1, 7
|-
| Greek numeral
| Z

Zeta

-Science:* Zeta functions, in mathematics** Riemann zeta function* Zeta potential, the electrokinetic potential of a colloidal system* Tropical Storm Zeta , formed in December 2005 and lasting through January 2006* Z-pinch, in fusion power...

, ζ
|-
| Roman numeral
| VII
|-
| Roman numeral (Unicode)
| Ⅶ, ⅶ
|-
| Amharic

Amharic language

Amharic is a Semitic language spoken in Ethiopia. It is the second most-spoken Semitic language in the world, after Arabic, and the official working language of the Federal Democratic Republic of Ethiopia. Thus, it has official status and is used nationwide. Amharic is also the official or working...

 || ፯
|-
| Arabic || ٧,7
|-
| Persian

Persian language

Persian is an Iranian language within the Indo-Iranian branch of the Indo-European languages. It is primarily spoken in Iran, Afghanistan, Tajikistan and countries which historically came under Persian influence...

 || ٧ - هفت
|-
| Bengali

Bengali language

Bengali or Bangla is an eastern Indo-Aryan language. It is native to the region of eastern South Asia known as Bengal, which comprises present day Bangladesh, the Indian state of West Bengal, and parts of the Indian states of Tripura and Assam. It is written with the Bengali script...

 || ৭
|-
| Chinese numeral || 七(qi)
|-
| Devanāgarī

Devanagari

Devanagari |deva]]" and "nāgarī" ), also called Nagari , is an abugida alphabet of India and Nepal...

 || ७ (saat)
|-
| Telugu

Telugu language

Telugu is a Central Dravidian language primarily spoken in the state of Andhra Pradesh, India, where it is an official language. It is also spoken in the neighbouring states of Chattisgarh, Karnataka, Maharashtra, Orissa and Tamil Nadu...

 || ౭
|-
| Tamil

Tamil language

Tamil is a Dravidian language spoken predominantly by Tamil people of the Indian subcontinent. It has official status in the Indian state of Tamil Nadu and in the Indian union territory of Pondicherry. Tamil is also an official language of Sri Lanka and Singapore...

 || ௭
|-
| Hebrew || ז (Zayin)
|-
| Khmer

Khmer numerals

Khmer numerals are characters used for writing numbers for several languages in Cambodia, most notably Cambodia's official language, Khmer. They date back to at least the oldest known epigraphical inscription of the Khmer numerals in 604 AD, found on a stele in Prasat Bayang, Cambodia, located not...

 || ៧
|-
| Thai

Thai numerals

Thai numerals constitute a numeral system of Thai number names for the Khmer numerals traditionally used in Thailand, also used for the more common Arabic numerals, and which follow the Hindu-Arabic numeral system.-Usage:...

 || ๗
|-
| prefixes

Numerical prefix

Number prefixes are prefixes derived from numbers or numerals. In English and other European languages, they are used to coin numerous series of words, such as unicycle – bicycle – tricycle, dyad – triad – decade, biped – quadruped, September – October – November – December, decimal – hexadecimal,...

| hepta-/hept- (from Greek

Greek language

Greek is an independent branch of the Indo-European family of languages. Native to the southern Balkans, it has the longest documented history of any Indo-European language, spanning 34 centuries of written records. Its writing system has been the Greek alphabet for the majority of its history;...

)