672064644 has 24 divisors (see below), whose sum is σ = 1570776928. Its totient is φ = 223646400.

The previous prime is 672064639. The next prime is 672064651. The reversal of 672064644 is 446460276.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39382 + ... + 53805.

Almost surely, 2^672064644 is an apocalyptic number.

It is an amenable number.

672064644 is an abundant number, since it is smaller than the sum of its proper divisors (898712284).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

672064644 is a wasteful number, since it uses less digits than its factorization.

672064644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93795 (or 93793 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 39.

The square root of 672064644 is about 25924.2096118667. The cubic root of 672064644 is about 875.9319133504.

The spelling of 672064644 in words is "six hundred seventy-two million, sixty-four thousand, six hundred forty-four".