662491812 has 24 divisors (see below), whose sum is σ = 1546231456. Its totient is φ = 220771008.

The previous prime is 662491811. The next prime is 662491849. The reversal of 662491812 is 218194266.

It is not an unprimeable number, because it can be changed into a prime (662491811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78888 + ... + 86880.

Almost surely, 2^662491812 is an apocalyptic number.

It is an amenable number.

662491812 is an abundant number, since it is smaller than the sum of its proper divisors (883739644).

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

662491812 is a wasteful number, since it uses less digits than its factorization.

662491812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14907 (or 14905 counting only the distinct ones).

The product of its digits is 41472, while the sum is 39.

The square root of 662491812 is about 25738.9162942032. The cubic root of 662491812 is about 871.7531091995.

The spelling of 662491812 in words is "six hundred sixty-two million, four hundred ninety-one thousand, eight hundred twelve".