70 (number) - Wikipedia
https://en.wikipedia.org/wiki/70_(number)
WEBIn mathematics. 70 is: the fourth discrete tri-prime; or also termed Sphenic number, and the first of the form (2.5.r). [1] with an aliquot sum of 74; within an aliquot sequence of four composite numbers (70,74, 40, 50, 43, 1 ,0) to the Prime in the 43 -aliquot tree. a Pell number. the seventh pentagonal number. [2] the fourth tridecagonal number.
DA: 66 PA: 86 MOZ Rank: 8