72664655 has 8 divisors (see below), whose sum is σ = 99654432. Its totient is φ = 49827168.

The previous prime is 72664639. The next prime is 72664661. The reversal of 72664655 is 55646627.

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

It is a cyclic number.

It is not a de Polignac number, because 72664655 - 2⁴ = 72664639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1038032 + ... + 1038101.

It is an arithmetic number, because the mean of its divisors is an integer number (12456804).

Almost surely, 2^72664655 is an apocalyptic number.

72664655 is a deficient number, since it is larger than the sum of its proper divisors (26989777).

72664655 is a wasteful number, since it uses less digits than its factorization.

72664655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2076145.

The product of its digits is 302400, while the sum is 41.

The square root of 72664655 is about 8524.3565739591. The cubic root of 72664655 is about 417.2929734815.

It can be divided in two parts, 7 and 2664655, that added together give a palindrome (2664662).

The spelling of 72664655 in words is "seventy-two million, six hundred sixty-four thousand, six hundred fifty-five".