6662721516512 has 24 divisors (see below), whose sum is σ = 13118205555000. Its totient is φ = 3331113756544.

The previous prime is 6662721516499. The next prime is 6662721516533. The reversal of 6662721516512 is 2156151272666.

It is a super-2 number, since 2×6662721516512² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7280087 + ... + 8144022.

It is an arithmetic number, because the mean of its divisors is an integer number (546591898125).

Almost surely, 2^{6662721516512} is an apocalyptic number.

It is an amenable number.

6662721516512 is a deficient number, since it is larger than the sum of its proper divisors (6455484038488).

6662721516512 is a wasteful number, since it uses less digits than its factorization.

6662721516512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15437618 (or 15437610 counting only the distinct ones).

The product of its digits is 1814400, while the sum is 50.

The spelling of 6662721516512 in words is "six trillion, six hundred sixty-two billion, seven hundred twenty-one million, five hundred sixteen thousand, five hundred twelve".