656166556 has 6 divisors (see below), whose sum is σ = 1148291480. Its totient is φ = 328083276.

The previous prime is 656166551. The next prime is 656166587. The reversal of 656166556 is 655661656.

656166556 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×656166556² = 861109098425802272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656166551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82020816 + ... + 82020823.

Almost surely, 2^656166556 is an apocalyptic number.

It is an amenable number.

656166556 is a deficient number, since it is larger than the sum of its proper divisors (492124924).

656166556 is a wasteful number, since it uses less digits than its factorization.

656166556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164041643 (or 164041641 counting only the distinct ones).

The product of its digits is 972000, while the sum is 46.

The square root of 656166556 is about 25615.7482030098. The cubic root of 656166556 is about 868.9698274614.

The spelling of 656166556 in words is "six hundred fifty-six million, one hundred sixty-six thousand, five hundred fifty-six".