56666256 has 20 divisors (see below), whose sum is σ = 146387952. Its totient is φ = 18888736.

The previous prime is 56666249. The next prime is 56666263. The reversal of 56666256 is 65266665.

It is an interprime number because it is at equal distance from previous prime (56666249) and next prime (56666263).

It is a super-2 number, since 2×56666256² = 6422129138115072, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 590226 + ... + 590321.

Almost surely, 2^56666256 is an apocalyptic number.

It is an amenable number.

56666256 is an abundant number, since it is smaller than the sum of its proper divisors (89721696).

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

56666256 is a wasteful number, since it uses less digits than its factorization.

56666256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1180558 (or 1180552 counting only the distinct ones).

The product of its digits is 388800, while the sum is 42.

The square root of 56666256 is about 7527.6992501029. The cubic root of 56666256 is about 384.0975229734.

The spelling of 56666256 in words is "fifty-six million, six hundred sixty-six thousand, two hundred fifty-six".