72664823 has 8 divisors (see below), whose sum is σ = 90595200. Its totient is φ = 56621880.

The previous prime is 72664799. The next prime is 72664841. The reversal of 72664823 is 32846627.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 72664823 - 2¹² = 72660727 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 (72664723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 471773 + ... + 471926.

It is an arithmetic number, because the mean of its divisors is an integer number (11324400).

Almost surely, 2^72664823 is an apocalyptic number.

72664823 is a deficient number, since it is larger than the sum of its proper divisors (17930377).

72664823 is a wasteful number, since it uses less digits than its factorization.

72664823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 943717.

The product of its digits is 96768, while the sum is 38.

The square root of 72664823 is about 8524.3664280696. The cubic root of 72664823 is about 417.2932950738.

It can be divided in two parts, 7 and 2664823, that multiplied together give a square (18653761 = 4319²).

The spelling of 72664823 in words is "seventy-two million, six hundred sixty-four thousand, eight hundred twenty-three".