566666660 has 24 divisors (see below), whose sum is σ = 1360000320. Its totient is φ = 194285664.

The previous prime is 566666651. The next prime is 566666677. The reversal of 566666660 is 66666665.

It is a super-2 number, since 2×566666660² = 642222207111111200, which contains 22 as substring.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

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 7 ways as a sum of consecutive naturals, for example, 2023670 + ... + 2023949.

It is an arithmetic number, because the mean of its divisors is an integer number (56666680).

Almost surely, 2^566666660 is an apocalyptic number.

It is an amenable number.

566666660 is an abundant number, since it is smaller than the sum of its proper divisors (793333660).

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

566666660 is a wasteful number, since it uses less digits than its factorization.

566666660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4047635 (or 4047633 counting only the distinct ones).

The product of its (nonzero) digits is 1399680, while the sum is 47.

The square root of 566666660 is about 23804.7612884482. The cubic root of 566666660 is about 827.5150236256.

The spelling of 566666660 in words is "five hundred sixty-six million, six hundred sixty-six thousand, six hundred sixty".