56622661 has 2 divisors, whose sum is σ = 56622662. Its totient is φ = 56622660.

The previous prime is 56622649. The next prime is 56622689. The reversal of 56622661 is 16622665.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54390625 + 2232036 = 7375^2 + 1494^2 .

It is a cyclic number.

It is not a de Polignac number, because 56622661 - 2¹⁵ = 56589893 is a prime.

It is a super-2 number, since 2×56622661² = 6412251477441842, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56622161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28311330 + 28311331.

It is an arithmetic number, because the mean of its divisors is an integer number (28311331).

Almost surely, 2^56622661 is an apocalyptic number.

It is an amenable number.

56622661 is a deficient number, since it is larger than the sum of its proper divisors (1).

56622661 is an equidigital number, since it uses as much as digits as its factorization.

56622661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25920, while the sum is 34.

The square root of 56622661 is about 7524.8030539011. The cubic root of 56622661 is about 383.9989985687.

The spelling of 56622661 in words is "fifty-six million, six hundred twenty-two thousand, six hundred sixty-one".