662721216 has 56 divisors (see below), whose sum is σ = 1845746880. Its totient is φ = 209279232.

The previous prime is 662721209. The next prime is 662721221. The reversal of 662721216 is 612127266.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87186 + ... + 94481.

Almost surely, 2^662721216 is an apocalyptic number.

It is an amenable number.

662721216 is an abundant number, since it is smaller than the sum of its proper divisors (1183025664).

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

662721216 is a wasteful number, since it uses less digits than its factorization.

662721216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181701 (or 181691 counting only the distinct ones).

The product of its digits is 12096, while the sum is 33.

The square root of 662721216 is about 25743.3722732668. The cubic root of 662721216 is about 871.8537195356.

The spelling of 662721216 in words is "six hundred sixty-two million, seven hundred twenty-one thousand, two hundred sixteen".