72665020 has 24 divisors (see below), whose sum is σ = 152871264. Its totient is φ = 29013696.

The previous prime is 72665009. The next prime is 72665057. The reversal of 72665020 is 2056627.

It is a self number, because there is not a number n which added to its sum of digits gives 72665020.

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, 9297 + ... + 15223.

It is an arithmetic number, because the mean of its divisors is an integer number (6369636).

Almost surely, 2^72665020 is an apocalyptic number.

It is an amenable number.

72665020 is an abundant number, since it is smaller than the sum of its proper divisors (80206244).

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

72665020 is a wasteful number, since it uses less digits than its factorization.

72665020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6549 (or 6547 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 72665020 is about 8524.3779831727. The cubic root of 72665020 is about 417.2936721783.

The spelling of 72665020 in words is "seventy-two million, six hundred sixty-five thousand, twenty".