166500664 has 32 divisors (see below), whose sum is σ = 341418240. Its totient is φ = 75493600.

The previous prime is 166500647. The next prime is 166500671. The reversal of 166500664 is 466005661.

166500664 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×166500664² = 55444942224881792, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36849 + ... + 41119.

It is an arithmetic number, because the mean of its divisors is an integer number (10669320).

Almost surely, 2^166500664 is an apocalyptic number.

It is an amenable number.

166500664 is an abundant number, since it is smaller than the sum of its proper divisors (174917576).

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

166500664 is a wasteful number, since it uses less digits than its factorization.

166500664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4731 (or 4727 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 166500664 is about 12903.5136300157. The cubic root of 166500664 is about 550.1384378788.

The spelling of 166500664 in words is "one hundred sixty-six million, five hundred thousand, six hundred sixty-four".