166651664 has 20 divisors (see below), whose sum is σ = 323354304. Its totient is φ = 83205408.

The previous prime is 166651651. The next prime is 166651673. The reversal of 166651664 is 466156661.

It is a super-2 number, since 2×166651664² = 55545554227937792, which contains 22 as substring.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

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, 4469 + ... + 18795.

Almost surely, 2^166651664 is an apocalyptic number.

It is an amenable number.

166651664 is a deficient number, since it is larger than the sum of its proper divisors (156702640).

166651664 is a wasteful number, since it uses less digits than its factorization.

166651664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15062 (or 15056 counting only the distinct ones).

The product of its digits is 155520, while the sum is 41.

The square root of 166651664 is about 12909.3634235000. The cubic root of 166651664 is about 550.3046950823.

The spelling of 166651664 in words is "one hundred sixty-six million, six hundred fifty-one thousand, six hundred sixty-four".