72660424 has 16 divisors (see below), whose sum is σ = 136734300. Its totient is φ = 36197952.

The previous prime is 72660421. The next prime is 72660433. The reversal of 72660424 is 42406627.

It can be written as a sum of positive squares in 2 ways, for example, as 70257924 + 2402500 = 8382^2 + 1550^2 .

It is not an unprimeable number, because it can be changed into a prime (72660421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14179 + ... + 18610.

Almost surely, 2^72660424 is an apocalyptic number.

It is an amenable number.

72660424 is a deficient number, since it is larger than the sum of its proper divisors (64073876).

72660424 is a wasteful number, since it uses less digits than its factorization.

72660424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33072 (or 33068 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 31.

The square root of 72660424 is about 8524.1083991230. The cubic root of 72660424 is about 417.2848741709.

The spelling of 72660424 in words is "seventy-two million, six hundred sixty thousand, four hundred twenty-four".