656412620 has 12 divisors (see below), whose sum is σ = 1378466544. Its totient is φ = 262565040.

The previous prime is 656412611. The next prime is 656412623. The reversal of 656412620 is 26214656.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (656412623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16410296 + ... + 16410335.

It is an arithmetic number, because the mean of its divisors is an integer number (114872212).

Almost surely, 2^656412620 is an apocalyptic number.

It is an amenable number.

656412620 is an abundant number, since it is smaller than the sum of its proper divisors (722053924).

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

656412620 is a wasteful number, since it uses less digits than its factorization.

656412620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32820640 (or 32820638 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 656412620 is about 25620.5507356887. The cubic root of 656412620 is about 869.0784357953.

The spelling of 656412620 in words is "six hundred fifty-six million, four hundred twelve thousand, six hundred twenty".