566656656665 has 24 divisors (see below), whose sum is σ = 765654720264. Its totient is φ = 402062355200.

The previous prime is 566656656649. The next prime is 566656656701.

566656656665 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 4 ways, for example, as 13208445184 + 553448211481 = 114928^2 + 743941^2 .

It is not a de Polignac number, because 566656656665 - 2⁴ = 566656656649 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 566656656595 and 566656656604.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11397422 + ... + 11447031.

It is an arithmetic number, because the mean of its divisors is an integer number (31902280011).

Almost surely, 2^566656656665 is an apocalyptic number.

566656656665 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

566656656665 is a deficient number, since it is larger than the sum of its proper divisors (198998063599).

566656656665 is a wasteful number, since it uses less digits than its factorization.

566656656665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22844521 (or 22844510 counting only the distinct ones).

The product of its digits is 1049760000, while the sum is 68.

The spelling of 566656656665 in words is "five hundred sixty-six billion, six hundred fifty-six million, six hundred fifty-six thousand, six hundred sixty-five".