656212631660 has 12 divisors (see below), whose sum is σ = 1378046526528. Its totient is φ = 262485052656.

The previous prime is 656212631653. The next prime is 656212631671. The reversal of 656212631660 is 66136212656.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16405315772 + ... + 16405315811.

It is an arithmetic number, because the mean of its divisors is an integer number (114837210544).

Almost surely, 2^656212631660 is an apocalyptic number.

It is an amenable number.

656212631660 is an abundant number, since it is smaller than the sum of its proper divisors (721833894868).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

656212631660 is a wasteful number, since it uses less digits than its factorization.

656212631660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32810631592 (or 32810631590 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 44.

The spelling of 656212631660 in words is "six hundred fifty-six billion, two hundred twelve million, six hundred thirty-one thousand, six hundred sixty".