56622665 has 32 divisors (see below), whose sum is σ = 81927936. Its totient is φ = 37058560.

The previous prime is 56622661. The next prime is 56622689.

56622665 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 56622665 - 2² = 56622661 is a prime.

It is a super-2 number, since 2×56622665² = 6412252383404450, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (56622661) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20189 + ... + 22821.

It is an arithmetic number, because the mean of its divisors is an integer number (2560248).

Almost surely, 2^56622665 is an apocalyptic number.

56622665 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

56622665 is a deficient number, since it is larger than the sum of its proper divisors (25305271).

56622665 is a wasteful number, since it uses less digits than its factorization.

56622665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2689.

The product of its digits is 129600, while the sum is 38.

The square root of 56622665 is about 7524.8033196888. The cubic root of 56622665 is about 383.9990076110. Note that the first 3 decimals are identical.

The spelling of 56622665 in words is "fifty-six million, six hundred twenty-two thousand, six hundred sixty-five".