566722776978 has 54 divisors (see below), whose sum is σ = 1235691930837. Its totient is φ = 187716266880.

The previous prime is 566722776943. The next prime is 566722777009. The reversal of 566722776978 is 879677227665.

It can be written as a sum of positive squares in 2 ways, for example, as 361293559929 + 205429217049 = 601077^2 + 453243^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=532317.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 610034818 + ... + 610035746.

Almost surely, 2^566722776978 is an apocalyptic number.

566722776978 is an abundant number, since it is smaller than the sum of its proper divisors (668969153859).

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

566722776978 is an frugal number, since it uses more digits than its factorization.

566722776978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2248 (or 1125 counting only the distinct ones).

The product of its digits is 746807040, while the sum is 72.

Multiplying 566722776978 by its sum of digits (72), we get a square (40804039942416 = 6387804²).

The spelling of 566722776978 in words is "five hundred sixty-six billion, seven hundred twenty-two million, seven hundred seventy-six thousand, nine hundred seventy-eight".