166374864 has 40 divisors (see below), whose sum is σ = 477558720. Its totient is φ = 55458144.

The previous prime is 166374863. The next prime is 166374881. The reversal of 166374864 is 468473661.

It is a happy number.

166374864 is a `hidden beast` number, since 1 + 6 + 637 + 4 + 8 + 6 + 4 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166374863) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 192132 + ... + 192995.

It is an arithmetic number, because the mean of its divisors is an integer number (11938968).

Almost surely, 2^166374864 is an apocalyptic number.

It is an amenable number.

166374864 is an abundant number, since it is smaller than the sum of its proper divisors (311183856).

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

166374864 is a wasteful number, since it uses less digits than its factorization.

166374864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385144 (or 385132 counting only the distinct ones).

The product of its digits is 580608, while the sum is 45.

The square root of 166374864 is about 12898.6380676411. The cubic root of 166374864 is about 549.9998501377. Note that the first 3 decimals are identical.

The spelling of 166374864 in words is "one hundred sixty-six million, three hundred seventy-four thousand, eight hundred sixty-four".