566651666 has 32 divisors (see below), whose sum is σ = 1005284352. Its totient is φ = 234420480.

The previous prime is 566651663. The next prime is 566651669. The reversal of 566651666 is 666156665.

It is an interprime number because it is at equal distance from previous prime (566651663) and next prime (566651669).

It is a super-2 number, since 2×566651666² = 642188221161151112, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 566651666.

It is not an unprimeable number, because it can be changed into a prime (566651663) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 196910 + ... + 199766.

It is an arithmetic number, because the mean of its divisors is an integer number (31415136).

Almost surely, 2^566651666 is an apocalyptic number.

566651666 is a deficient number, since it is larger than the sum of its proper divisors (438632686).

566651666 is a wasteful number, since it uses less digits than its factorization.

566651666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3354.

The product of its digits is 1166400, while the sum is 47.

The square root of 566651666 is about 23804.4463493693. The cubic root of 566651666 is about 827.5077248787.

The spelling of 566651666 in words is "five hundred sixty-six million, six hundred fifty-one thousand, six hundred sixty-six".