566942891 has 2 divisors, whose sum is σ = 566942892. Its totient is φ = 566942890.

The previous prime is 566942867. The next prime is 566942927. The reversal of 566942891 is 198249665.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 566942891 - 2²² = 562748587 is a prime.

It is not a weakly prime, because it can be changed into another prime (566942821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 283471445 + 283471446.

It is an arithmetic number, because the mean of its divisors is an integer number (283471446).

Almost surely, 2^566942891 is an apocalyptic number.

566942891 is a deficient number, since it is larger than the sum of its proper divisors (1).

566942891 is an equidigital number, since it uses as much as digits as its factorization.

566942891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 933120, while the sum is 50.

The square root of 566942891 is about 23810.5625931014. The cubic root of 566942891 is about 827.6494637272.

The spelling of 566942891 in words is "five hundred sixty-six million, nine hundred forty-two thousand, eight hundred ninety-one".