56656666 has 16 divisors (see below), whose sum is σ = 92907648. Its totient is φ = 25698400.

The previous prime is 56656643. The next prime is 56656673. The reversal of 56656666 is 66665665.

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, 8991 + ... + 13933.

It is an arithmetic number, because the mean of its divisors is an integer number (5806728).

Almost surely, 2^56656666 is an apocalyptic number.

56656666 is a deficient number, since it is larger than the sum of its proper divisors (36250982).

56656666 is a wasteful number, since it uses less digits than its factorization.

56656666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5477.

The product of its digits is 1166400, while the sum is 46.

The square root of 56656666 is about 7527.0622423360. The cubic root of 56656666 is about 384.0758539749.

The spelling of 56656666 in words is "fifty-six million, six hundred fifty-six thousand, six hundred sixty-six".