72664078673 has 16 divisors (see below), whose sum is σ = 77698756224. Its totient is φ = 67714563840.

The previous prime is 72664078657. The next prime is 72664078679. The reversal of 72664078673 is 37687046627.

It is a cyclic number.

It is not a de Polignac number, because 72664078673 - 2⁴ = 72664078657 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72664078679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3786683 + ... + 3805823.

It is an arithmetic number, because the mean of its divisors is an integer number (4856172264).

Almost surely, 2^72664078673 is an apocalyptic number.

It is an amenable number.

72664078673 is a deficient number, since it is larger than the sum of its proper divisors (5034677551).

72664078673 is a wasteful number, since it uses less digits than its factorization.

72664078673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21352.

The product of its (nonzero) digits is 14224896, while the sum is 56.

The spelling of 72664078673 in words is "seventy-two billion, six hundred sixty-four million, seventy-eight thousand, six hundred seventy-three".