566551664 has 20 divisors (see below), whose sum is σ = 1254507504. Its totient is φ = 242807808.

The previous prime is 566551637. The next prime is 566551679. The reversal of 566551664 is 466155665.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2529137 + ... + 2529360.

Almost surely, 2^566551664 is an apocalyptic number.

It is an amenable number.

566551664 is an abundant number, since it is smaller than the sum of its proper divisors (687955840).

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

566551664 is a wasteful number, since it uses less digits than its factorization.

566551664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5058512 (or 5058506 counting only the distinct ones).

The product of its digits is 648000, while the sum is 44.

The square root of 566551664 is about 23802.3457667516. The cubic root of 566551664 is about 827.4590428276.

The spelling of 566551664 in words is "five hundred sixty-six million, five hundred fifty-one thousand, six hundred sixty-four".