70 (number)

← 69 70 71 →
← 70 71 72 73 74 75 76 77 78 79 → List of numbers — Integers ← 0 10 20 30 40 50 60 70 80 90 →
Cardinal	seventy
Ordinal	70th (seventieth)
Factorization	2 × 5 × 7
Divisors	1, 2, 5, 7, 10, 14, 35, 70
Roman numeral	LXX
Binary	10001102
Ternary	21213
Quaternary	10124
Quinary	2405
Senary	1546
Octal	1068
Duodecimal	5A12
Hexadecimal	4616
Vigesimal	3A20
Base 36	1Y36
Hebrew	ע (Ayin)

70 (seventy) is the natural number following 69 and preceding 71.

70 is:

The sum of the first 24 squares starting from 1 is 70². This relates 70 to the Leech lattice and thus string theory.

Several languages, especially ones with vigesimal number systems, do not have a specific word for 70: for example, French soixante-dix "sixty-ten"; Danish halvfjerds, short for halvfjerdsindstyve "three and a half score". (For French, this is true only in France; other French-speaking regions such as Belgium, Switzerland, Aosta Valley and Jersey use septante.)

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