56566771 has 2 divisors, whose sum is σ = 56566772. Its totient is φ = 56566770.

The previous prime is 56566753. The next prime is 56566787. The reversal of 56566771 is 17766565.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56566771 - 2⁵ = 56566739 is a prime.

It is not a weakly prime, because it can be changed into another prime (56566171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28283385 + 28283386.

It is an arithmetic number, because the mean of its divisors is an integer number (28283386).

Almost surely, 2^56566771 is an apocalyptic number.

56566771 is a deficient number, since it is larger than the sum of its proper divisors (1).

56566771 is an equidigital number, since it uses as much as digits as its factorization.

56566771 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 264600, while the sum is 43.

The square root of 56566771 is about 7521.0884185735. The cubic root of 56566771 is about 383.8726135439.

The spelling of 56566771 in words is "fifty-six million, five hundred sixty-six thousand, seven hundred seventy-one".