656907012 has 36 divisors (see below), whose sum is σ = 1661377536. Its totient is φ = 218855280.

The previous prime is 656906993. The next prime is 656907029. The reversal of 656907012 is 210709656.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an alternating number because its digits alternate between even and odd.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 93337 + ... + 100127.

It is an arithmetic number, because the mean of its divisors is an integer number (46149376).

Almost surely, 2^656907012 is an apocalyptic number.

It is an amenable number.

656907012 is an abundant number, since it is smaller than the sum of its proper divisors (1004470524).

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

656907012 is a wasteful number, since it uses less digits than its factorization.

656907012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9488 (or 9483 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 656907012 is about 25630.1972680664. The cubic root of 656907012 is about 869.2965697288.

The spelling of 656907012 in words is "six hundred fifty-six million, nine hundred seven thousand, twelve".