672702716521 has 16 divisors (see below), whose sum is σ = 744345460800. Its totient is φ = 602849491200.

The previous prime is 672702716509. The next prime is 672702716549. The reversal of 672702716521 is 125617207276.

It is not a de Polignac number, because 672702716521 - 2¹¹ = 672702714473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (672702716501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 713916 + ... + 1362013.

It is an arithmetic number, because the mean of its divisors is an integer number (46521591300).

Almost surely, 2^672702716521 is an apocalyptic number.

It is an amenable number.

672702716521 is a deficient number, since it is larger than the sum of its proper divisors (71642744279).

672702716521 is a wasteful number, since it uses less digits than its factorization.

672702716521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2076360.

The product of its (nonzero) digits is 493920, while the sum is 46.

The spelling of 672702716521 in words is "six hundred seventy-two billion, seven hundred two million, seven hundred sixteen thousand, five hundred twenty-one".