166670816 has 24 divisors (see below), whose sum is σ = 353375064. Its totient is φ = 76924800.

The previous prime is 166670807. The next prime is 166670837. The reversal of 166670816 is 618076661.

It is a super-2 number, since 2×166670816² = 55558321812211712, 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 3 ways as a sum of consecutive naturals, for example, 199910 + ... + 200741.

It is an arithmetic number, because the mean of its divisors is an integer number (14723961).

Almost surely, 2^166670816 is an apocalyptic number.

166670816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

166670816 is an abundant number, since it is smaller than the sum of its proper divisors (186704248).

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

166670816 is a wasteful number, since it uses less digits than its factorization.

166670816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400674 (or 400666 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 166670816 is about 12910.1051893468. The cubic root of 166670816 is about 550.3257750435.

The spelling of 166670816 in words is "one hundred sixty-six million, six hundred seventy thousand, eight hundred sixteen".