672745636 has 12 divisors (see below), whose sum is σ = 1177497328. Its totient is φ = 336317832.

The previous prime is 672745631. The next prime is 672745681. The reversal of 672745636 is 636547276.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (672745631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27595 + ... + 45901.

Almost surely, 2^672745636 is an apocalyptic number.

It is an amenable number.

672745636 is a deficient number, since it is larger than the sum of its proper divisors (504751692).

672745636 is a wasteful number, since it uses less digits than its factorization.

672745636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27498 (or 27496 counting only the distinct ones).

The product of its digits is 1270080, while the sum is 46.

The square root of 672745636 is about 25937.3405730040. The cubic root of 672745636 is about 876.2276692566.

The spelling of 672745636 in words is "six hundred seventy-two million, seven hundred forty-five thousand, six hundred thirty-six".