656620632 has 24 divisors (see below), whose sum is σ = 1778347740. Its totient is φ = 218873520.

The previous prime is 656620609. The next prime is 656620637. The reversal of 656620632 is 236026656.

It is a tau number, because it is divible by the number of its divisors (24).

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656620637) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4559794 + ... + 4559937.

Almost surely, 2^656620632 is an apocalyptic number.

It is an amenable number.

656620632 is an abundant number, since it is smaller than the sum of its proper divisors (1121727108).

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

656620632 is a wasteful number, since it uses less digits than its factorization.

656620632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9119743 (or 9119736 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 36.

The square root of 656620632 is about 25624.6098897134. The cubic root of 656620632 is about 869.1702274751.

The spelling of 656620632 in words is "six hundred fifty-six million, six hundred twenty thousand, six hundred thirty-two".