70  

Cardinal  seventy 
Ordinal  70th (seventieth) 
Factorization  
Divisors  1,2 5, 7, 10, 14, 35, 70 
Roman numeral  LXX 
Binary  1000110_{2} 
Octal  106_{8} 
Duodecimal  5A_{12} 
Hexadecimal  46_{16} 
Hebrew  ע (Ayin) 
70 (seventy) is the natural number following 69 and preceding 71.
Contents 
Its factorization makes it a sphenic number. 70 is a Pell number and a generalized heptagonal number, one of only two numbers to be both.^{[1]} Also, it is the seventh pentagonal number and the fourth 13gonal number, as well as the fifth pentatope number. It is the smallest weird number.
Since it is possible to find sequences of 70 consecutive integers such that each inner member member shares a factor with either the first or the last member, 70 is an Erdős–Woods number.
In base 10, it is a Harshad number.
70 is:
The French do not have a word for 70, instead using "soixantedix" (60 + 10). Other Frenchspeaking countries such as Belgium and Switzerland do have a word for it, using "septante."^{[2]}
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Order  seventieth 

Seventy is the number that is after sixtynine and before seventyone.
The prime factors of seventy are 2, 5, and 7. (2 * 5 * 7 = 70)
