566400820 has 12 divisors (see below), whose sum is σ = 1189441764. Its totient is φ = 226560320.

The previous prime is 566400817. The next prime is 566400833. The reversal of 566400820 is 28004665.

It can be written as a sum of positive squares in 2 ways, for example, as 249703204 + 316697616 = 15802^2 + 17796^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14160001 + ... + 14160040.

It is an arithmetic number, because the mean of its divisors is an integer number (99120147).

Almost surely, 2^566400820 is an apocalyptic number.

It is an amenable number.

566400820 is an abundant number, since it is smaller than the sum of its proper divisors (623040944).

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

566400820 is a wasteful number, since it uses less digits than its factorization.

566400820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28320050 (or 28320048 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 566400820 is about 23799.1768765224. The cubic root of 566400820 is about 827.3855995044.

The spelling of 566400820 in words is "five hundred sixty-six million, four hundred thousand, eight hundred twenty".