72661025 has 24 divisors (see below), whose sum is σ = 94976064. Its totient is φ = 55035200.

The previous prime is 72661003. The next prime is 72661063. The reversal of 72661025 is 52016627.

It is not a de Polignac number, because 72661025 - 2¹⁴ = 72644641 is a prime.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 60935 + ... + 62115.

It is an arithmetic number, because the mean of its divisors is an integer number (3957336).

Almost surely, 2^72661025 is an apocalyptic number.

It is an amenable number.

72661025 is a deficient number, since it is larger than the sum of its proper divisors (22315039).

72661025 is a wasteful number, since it uses less digits than its factorization.

72661025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1321 (or 1316 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 72661025 is about 8524.1436520040. The cubic root of 72661025 is about 417.2860246712.

The spelling of 72661025 in words is "seventy-two million, six hundred sixty-one thousand, twenty-five".