56866169 has 2 divisors, whose sum is σ = 56866170. Its totient is φ = 56866168.

The previous prime is 56866163. The next prime is 56866181. The reversal of 56866169 is 96166865.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44049769 + 12816400 = 6637^2 + 3580^2 .

It is a cyclic number.

It is not a de Polignac number, because 56866169 - 2¹² = 56862073 is a prime.

It is a super-2 number, since 2×56866169² = 6467522353473122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (56866163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28433084 + 28433085.

It is an arithmetic number, because the mean of its divisors is an integer number (28433085).

Almost surely, 2^56866169 is an apocalyptic number.

It is an amenable number.

56866169 is a deficient number, since it is larger than the sum of its proper divisors (1).

56866169 is an equidigital number, since it uses as much as digits as its factorization.

56866169 is an evil number, because the sum of its binary digits is even.

The product of its digits is 466560, while the sum is 47.

The square root of 56866169 is about 7540.9660521713. The cubic root of 56866169 is about 384.5486789885.

The spelling of 56866169 in words is "fifty-six million, eight hundred sixty-six thousand, one hundred sixty-nine".