72688166 has 16 divisors (see below), whose sum is σ = 111041280. Its totient is φ = 35678280.

The previous prime is 72688157. The next prime is 72688223. The reversal of 72688166 is 66188627.

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, 47351 + ... + 48861.

It is an arithmetic number, because the mean of its divisors is an integer number (6940080).

Almost surely, 2^72688166 is an apocalyptic number.

72688166 is a deficient number, since it is larger than the sum of its proper divisors (38353114).

72688166 is a wasteful number, since it uses less digits than its factorization.

72688166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1939.

The product of its digits is 193536, while the sum is 44.

The square root of 72688166 is about 8525.7355107932. The cubic root of 72688166 is about 417.3379743473.

The spelling of 72688166 in words is "seventy-two million, six hundred eighty-eight thousand, one hundred sixty-six".