166671660 has 48 divisors (see below), whose sum is σ = 469407456. Its totient is φ = 44186112.

The previous prime is 166671649. The next prime is 166671691. The reversal of 166671660 is 66176661.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2352 + ... + 18408.

It is an arithmetic number, because the mean of its divisors is an integer number (9779322).

Almost surely, 2^166671660 is an apocalyptic number.

166671660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166671660 is an abundant number, since it is smaller than the sum of its proper divisors (302735796).

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

166671660 is a wasteful number, since it uses less digits than its factorization.

166671660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16242 (or 16240 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 39.

The square root of 166671660 is about 12910.1378768780. The cubic root of 166671660 is about 550.3267039687.

It can be divided in two parts, 166671 and 660, that added together give a triangular number (167331 = T₅₇₈).

The spelling of 166671660 in words is "one hundred sixty-six million, six hundred seventy-one thousand, six hundred sixty".