566391820 has 12 divisors (see below), whose sum is σ = 1189422864. Its totient is φ = 226556720.

The previous prime is 566391811. The next prime is 566391823. The reversal of 566391820 is 28193665.

It is not an unprimeable number, because it can be changed into a prime (566391823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14159776 + ... + 14159815.

It is an arithmetic number, because the mean of its divisors is an integer number (99118572).

Almost surely, 2^566391820 is an apocalyptic number.

It is an amenable number.

566391820 is an abundant number, since it is smaller than the sum of its proper divisors (623031044).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

566391820 is a wasteful number, since it uses less digits than its factorization.

566391820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28319600 (or 28319598 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 566391820 is about 23798.9877936016. The cubic root of 566391820 is about 827.3812171485.

The spelling of 566391820 in words is "five hundred sixty-six million, three hundred ninety-one thousand, eight hundred twenty".