662812816 has 10 divisors (see below), whose sum is σ = 1284199862. Its totient is φ = 331406400.

The previous prime is 662812789. The next prime is 662812817. The reversal of 662812816 is 618218266.

It can be written as a sum of positive squares in only one way, i.e., 508953600 + 153859216 = 22560^2 + 12404^2 .

It is not an unprimeable number, because it can be changed into a prime (662812817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20712885 + ... + 20712916.

Almost surely, 2^662812816 is an apocalyptic number.

It is an amenable number.

662812816 is a deficient number, since it is larger than the sum of its proper divisors (621387046).

662812816 is a wasteful number, since it uses less digits than its factorization.

662812816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41425809 (or 41425803 counting only the distinct ones).

The product of its digits is 55296, while the sum is 40.

The square root of 662812816 is about 25745.1513104895. The cubic root of 662812816 is about 871.8938863104.

The spelling of 662812816 in words is "six hundred sixty-two million, eight hundred twelve thousand, eight hundred sixteen".