166980872 has 16 divisors (see below), whose sum is σ = 313267500. Its totient is φ = 83442880.

The previous prime is 166980871. The next prime is 166980881. The reversal of 166980872 is 278089661.

It can be written as a sum of positive squares in 2 ways, for example, as 165739876 + 1240996 = 12874^2 + 1114^2 .

It is a super-2 number, since 2×166980872² = 55765223227760768, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (166980871) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12254 + ... + 22002.

Almost surely, 2^166980872 is an apocalyptic number.

It is an amenable number.

166980872 is a deficient number, since it is larger than the sum of its proper divisors (146286628).

166980872 is a wasteful number, since it uses less digits than its factorization.

166980872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11896 (or 11892 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 47.

The square root of 166980872 is about 12922.1078775872. The cubic root of 166980872 is about 550.6668187719. Note that the first 3 decimals are identical.

The spelling of 166980872 in words is "one hundred sixty-six million, nine hundred eighty thousand, eight hundred seventy-two".