166399960 has 32 divisors (see below), whose sum is σ = 374790240. Its totient is φ = 66490624.

The previous prime is 166399949. The next prime is 166399993. The reversal of 166399960 is 69993661.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55869 + ... + 58771.

It is an arithmetic number, because the mean of its divisors is an integer number (11712195).

Almost surely, 2^166399960 is an apocalyptic number.

166399960 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166399960 is an abundant number, since it is smaller than the sum of its proper divisors (208390280).

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

166399960 is a wasteful number, since it uses less digits than its factorization.

166399960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4347 (or 4343 counting only the distinct ones).

The product of its (nonzero) digits is 472392, while the sum is 49.

The square root of 166399960 is about 12899.6108468434. The cubic root of 166399960 is about 550.0275027569.

The spelling of 166399960 in words is "one hundred sixty-six million, three hundred ninety-nine thousand, nine hundred sixty".