56620665 has 48 divisors (see below), whose sum is σ = 105580800. Its totient is φ = 27979776.

The previous prime is 56620661. The next prime is 56620667. The reversal of 56620665 is 56602665.

It is not a de Polignac number, because 56620665 - 2² = 56620661 is a prime.

It is not an unprimeable number, because it can be changed into a prime (56620661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 39481 + ... + 40889.

It is an arithmetic number, because the mean of its divisors is an integer number (2199600).

Almost surely, 2^56620665 is an apocalyptic number.

It is an amenable number.

56620665 is a deficient number, since it is larger than the sum of its proper divisors (48960135).

56620665 is a wasteful number, since it uses less digits than its factorization.

56620665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1486 (or 1483 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The square root of 56620665 is about 7524.6704246764. The cubic root of 56620665 is about 383.9944864117.

The spelling of 56620665 in words is "fifty-six million, six hundred twenty thousand, six hundred sixty-five".