656021166 has 8 divisors (see below), whose sum is σ = 1312042344. Its totient is φ = 218673720.

The previous prime is 656021131. The next prime is 656021183. The reversal of 656021166 is 661120656.

656021166 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

656021166 is an admirable 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, 54668425 + ... + 54668436.

It is an arithmetic number, because the mean of its divisors is an integer number (164005293).

Almost surely, 2^656021166 is an apocalyptic number.

656021166 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

656021166 is a wasteful number, since it uses less digits than its factorization.

656021166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109336866.

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 656021166 is about 25612.9101431290. The cubic root of 656021166 is about 868.9056421035.

The spelling of 656021166 in words is "six hundred fifty-six million, twenty-one thousand, one hundred sixty-six".