65 (number) - Wikipedia
https://en.m.wikipedia.org/wiki/65_(number)
Web65 has a prime aliquot sum of 19 within an aliquot sequence of one composite numbers (65,19,1,0) to the prime; as the first member' of the 19-aliquot tree. It is an octagonal number. It is also a Cullen number. Given 65, the Mertens function returns 0. This number is the magic constant of a 5x5 normal magic square:
DA: 17 PA: 34 MOZ Rank: 12