72661375 has 16 divisors (see below), whose sum is σ = 91364832. Its totient is φ = 57691200.

The previous prime is 72661367. The next prime is 72661397. The reversal of 72661375 is 57316627.

It is not a de Polignac number, because 72661375 - 2³ = 72661367 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15004 + ... + 19246.

It is an arithmetic number, because the mean of its divisors is an integer number (5710302).

Almost surely, 2^72661375 is an apocalyptic number.

72661375 is a deficient number, since it is larger than the sum of its proper divisors (18703457).

72661375 is a wasteful number, since it uses less digits than its factorization.

72661375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4395 (or 4385 counting only the distinct ones).

The product of its digits is 52920, while the sum is 37.

The square root of 72661375 is about 8524.1641819008. The cubic root of 72661375 is about 417.2866946768.

The spelling of 72661375 in words is "seventy-two million, six hundred sixty-one thousand, three hundred seventy-five".