72663685 has 16 divisors (see below), whose sum is σ = 90058752. Its totient is φ = 56246400.

The previous prime is 72663677. The next prime is 72663697. The reversal of 72663685 is 58636627.

It is not a de Polignac number, because 72663685 - 2³ = 72663677 is a prime.

It is a super-2 number, since 2×72663685² = 10560022235558450, which contains 22 as substring.

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, 24640 + ... + 27430.

It is an arithmetic number, because the mean of its divisors is an integer number (5628672).

Almost surely, 2^72663685 is an apocalyptic number.

It is an amenable number.

72663685 is a deficient number, since it is larger than the sum of its proper divisors (17395067).

72663685 is a wasteful number, since it uses less digits than its factorization.

72663685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2964.

The product of its digits is 362880, while the sum is 43.

The square root of 72663685 is about 8524.2996779794. The cubic root of 72663685 is about 417.2911166596.

The spelling of 72663685 in words is "seventy-two million, six hundred sixty-three thousand, six hundred eighty-five".