662721696 has 192 divisors, whose sum is σ = 2379283200. Its totient is φ = 174763008.

The previous prime is 662721643. The next prime is 662721707. The reversal of 662721696 is 696127266.

662721696 is a `hidden beast` number, since 6 + 627 + 2 + 16 + 9 + 6 = 666.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 74410 + ... + 82838.

It is an arithmetic number, because the mean of its divisors is an integer number (12392100).

Almost surely, 2^662721696 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 662721696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1189641600).

662721696 is an abundant number, since it is smaller than the sum of its proper divisors (1716561504).

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

662721696 is a wasteful number, since it uses less digits than its factorization.

662721696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8468 (or 8454 counting only the distinct ones).

The product of its digits is 326592, while the sum is 45.

The square root of 662721696 is about 25743.3815960530. The cubic root of 662721696 is about 871.8539300261.

The spelling of 662721696 in words is "six hundred sixty-two million, seven hundred twenty-one thousand, six hundred ninety-six".