56669977 has 16 divisors (see below), whose sum is σ = 71636992. Its totient is φ = 43623360.

The previous prime is 56669971. The next prime is 56669981. The reversal of 56669977 is 77996665.

56669977 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 56669977 - 2⁷ = 56669849 is a prime.

It is a super-2 number, since 2×56669977² = 6422972586361058, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (56669971) 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 15 ways as a sum of consecutive naturals, for example, 5049 + ... + 11782.

It is an arithmetic number, because the mean of its divisors is an integer number (4477312).

Almost surely, 2^56669977 is an apocalyptic number.

It is an amenable number.

56669977 is a deficient number, since it is larger than the sum of its proper divisors (14967015).

56669977 is a wasteful number, since it uses less digits than its factorization.

56669977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16888.

The product of its digits is 4286520, while the sum is 55.

The square root of 56669977 is about 7527.9463999155. The cubic root of 56669977 is about 384.1059300673.

The spelling of 56669977 in words is "fifty-six million, six hundred sixty-nine thousand, nine hundred seventy-seven".