72663885 has 120 divisors (see below), whose sum is σ = 159325056. Its totient is φ = 31026240.

The previous prime is 72663863. The next prime is 72663917. The reversal of 72663885 is 58836627.

72663885 is a `hidden beast` number, since 7 + 2 + 6 + 638 + 8 + 5 = 666.

It is not a de Polignac number, because 72663885 - 2⁹ = 72663373 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

Its product of digits (483840) is a multiple of the sum of its prime divisors (105).

It is a self number, because there is not a number n which added to its sum of digits gives 72663885.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 1023400 + ... + 1023470.

Almost surely, 2^72663885 is an apocalyptic number.

It is an amenable number.

72663885 is an abundant number, since it is smaller than the sum of its proper divisors (86661171).

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

72663885 is a wasteful number, since it uses less digits than its factorization.

72663885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133 (or 105 counting only the distinct ones).

The product of its digits is 483840, while the sum is 45.

The square root of 72663885 is about 8524.3114091403. The cubic root of 72663885 is about 417.2914995108.

The spelling of 72663885 in words is "seventy-two million, six hundred sixty-three thousand, eight hundred eighty-five".