166977864 has 48 divisors (see below), whose sum is σ = 458441100. Its totient is φ = 54895104.

The previous prime is 166977857. The next prime is 166977913. The reversal of 166977864 is 468779661.

It is a happy number.

166977864 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 165636900 + 1340964 = 12870^2 + 1158^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 166977864.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10629 + ... + 21140.

Almost surely, 2^166977864 is an apocalyptic number.

It is an amenable number.

166977864 is an abundant number, since it is smaller than the sum of its proper divisors (291463236).

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

166977864 is a wasteful number, since it uses less digits than its factorization.

166977864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31854 (or 31847 counting only the distinct ones).

The product of its digits is 3048192, while the sum is 54.

The square root of 166977864 is about 12921.9914873830. The cubic root of 166977864 is about 550.6635121741.

The spelling of 166977864 in words is "one hundred sixty-six million, nine hundred seventy-seven thousand, eight hundred sixty-four".