672336818 has 4 divisors (see below), whose sum is σ = 1008505230. Its totient is φ = 336168408.

The previous prime is 672336787. The next prime is 672336829. The reversal of 672336818 is 818633276.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 670654609 + 1682209 = 25897^2 + 1297^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 168084203 + ... + 168084206.

Almost surely, 2^672336818 is an apocalyptic number.

672336818 is a deficient number, since it is larger than the sum of its proper divisors (336168412).

672336818 is a wasteful number, since it uses less digits than its factorization.

672336818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336168411.

The product of its digits is 290304, while the sum is 44.

The square root of 672336818 is about 25929.4584980096. The cubic root of 672336818 is about 876.0501429079.

The spelling of 672336818 in words is "six hundred seventy-two million, three hundred thirty-six thousand, eight hundred eighteen".