566507991 has 16 divisors (see below), whose sum is σ = 864186624. Its totient is φ = 323367744.

The previous prime is 566507899. The next prime is 566507993. The reversal of 566507991 is 199705665.

566507991 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 566507991 - 2⁷ = 566507863 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 566507991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (566507993) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5860 + ... + 34166.

It is an arithmetic number, because the mean of its divisors is an integer number (54011664).

Almost surely, 2^566507991 is an apocalyptic number.

566507991 is a deficient number, since it is larger than the sum of its proper divisors (297678633).

566507991 is a wasteful number, since it uses less digits than its factorization.

566507991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29270.

The product of its (nonzero) digits is 510300, while the sum is 48.

The square root of 566507991 is about 23801.4283394926. The cubic root of 566507991 is about 827.4377805435.

The spelling of 566507991 in words is "five hundred sixty-six million, five hundred seven thousand, nine hundred ninety-one".