166673556 has 72 divisors (see below), whose sum is σ = 498126720. Its totient is φ = 45976896.

The previous prime is 166673543. The next prime is 166673561. The reversal of 166673556 is 655376661.

166673556 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4096 + ... + 18711.

Almost surely, 2^166673556 is an apocalyptic number.

It is an amenable number.

166673556 is an abundant number, since it is smaller than the sum of its proper divisors (331453164).

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

166673556 is a wasteful number, since it uses less digits than its factorization.

166673556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22853 (or 22848 counting only the distinct ones).

The product of its digits is 680400, while the sum is 45.

The square root of 166673556 is about 12910.2113073334. The cubic root of 166673556 is about 550.3287907371.

The spelling of 166673556 in words is "one hundred sixty-six million, six hundred seventy-three thousand, five hundred fifty-six".