56166791 has 2 divisors, whose sum is σ = 56166792. Its totient is φ = 56166790.

The previous prime is 56166749. The next prime is 56166809. The reversal of 56166791 is 19766165.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56166791 is a prime.

It is a super-2 number, since 2×56166791² = 6309416822475362, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56166701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28083395 + 28083396.

It is an arithmetic number, because the mean of its divisors is an integer number (28083396).

Almost surely, 2^56166791 is an apocalyptic number.

56166791 is a deficient number, since it is larger than the sum of its proper divisors (1).

56166791 is an equidigital number, since it uses as much as digits as its factorization.

56166791 is an evil number, because the sum of its binary digits is even.

The product of its digits is 68040, while the sum is 41.

The square root of 56166791 is about 7494.4506803368. The cubic root of 56166791 is about 382.9656930597.

The spelling of 56166791 in words is "fifty-six million, one hundred sixty-six thousand, seven hundred ninety-one".