166613872 has 40 divisors (see below), whose sum is σ = 349102656. Its totient is φ = 76732416.

The previous prime is 166613851. The next prime is 166613891. The reversal of 166613872 is 278316661.

It is a happy number.

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, 6268 + ... + 19300.

Almost surely, 2^166613872 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 166613872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (174551328).

166613872 is an abundant number, since it is smaller than the sum of its proper divisors (182488784).

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

166613872 is a wasteful number, since it uses less digits than its factorization.

166613872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13105 (or 13099 counting only the distinct ones).

The product of its digits is 72576, while the sum is 40.

The square root of 166613872 is about 12907.8995967586. The cubic root of 166613872 is about 550.2630939629.

The spelling of 166613872 in words is "one hundred sixty-six million, six hundred thirteen thousand, eight hundred seventy-two".