72166132 has 24 divisors (see below), whose sum is σ = 130237856. Its totient is φ = 34963488.

The previous prime is 72166117. The next prime is 72166141. The reversal of 72166132 is 23166127.

It is a self number, because there is not a number n which added to its sum of digits gives 72166132.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41023 + ... + 42745.

Almost surely, 2^72166132 is an apocalyptic number.

It is an amenable number.

72166132 is a deficient number, since it is larger than the sum of its proper divisors (58071724).

72166132 is a wasteful number, since it uses less digits than its factorization.

72166132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2047 (or 2045 counting only the distinct ones).

The product of its digits is 3024, while the sum is 28.

The square root of 72166132 is about 8495.0651557242. The cubic root of 72166132 is about 416.3364896464.

The spelling of 72166132 in words is "seventy-two million, one hundred sixty-six thousand, one hundred thirty-two".