72668511 has 12 divisors (see below), whose sum is σ = 105793792. Its totient is φ = 48063456.

The previous prime is 72668509. The next prime is 72668537. The reversal of 72668511 is 11586627.

It is not a de Polignac number, because 72668511 - 2¹ = 72668509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72668501) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30646 + ... + 32931.

Almost surely, 2^72668511 is an apocalyptic number.

72668511 is a deficient number, since it is larger than the sum of its proper divisors (33125281).

72668511 is a wasteful number, since it uses less digits than its factorization.

72668511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63710 (or 63707 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 72668511 is about 8524.5827463871. The cubic root of 72668511 is about 417.3003546641.

The spelling of 72668511 in words is "seventy-two million, six hundred sixty-eight thousand, five hundred eleven".