656869612 has 24 divisors (see below), whose sum is σ = 1317544704. Its totient is φ = 280700112.

The previous prime is 656869601. The next prime is 656869649. The reversal of 656869612 is 216968656.

It is a happy number.

It is a hoax number, since the sum of its digits (49) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24088 + ... + 43519.

It is an arithmetic number, because the mean of its divisors is an integer number (54897696).

Almost surely, 2^656869612 is an apocalyptic number.

It is an amenable number.

656869612 is an abundant number, since it is smaller than the sum of its proper divisors (660675092).

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

656869612 is a wasteful number, since it uses less digits than its factorization.

656869612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67965 (or 67963 counting only the distinct ones).

The product of its digits is 933120, while the sum is 49.

The square root of 656869612 is about 25629.4676495631. The cubic root of 656869612 is about 869.2800720570.

The spelling of 656869612 in words is "six hundred fifty-six million, eight hundred sixty-nine thousand, six hundred twelve".