6657406676664 has 64 divisors (see below), whose sum is σ = 16682231867040. Its totient is φ = 2213977766400.

The previous prime is 6657406676611. The next prime is 6657406676677. The reversal of 6657406676664 is 4666766047566.

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 15 ways as a sum of consecutive naturals, for example, 25281582 + ... + 25543554.

Almost surely, 2^{6657406676664} is an apocalyptic number.

It is an amenable number.

6657406676664 is an abundant number, since it is smaller than the sum of its proper divisors (10024825190376).

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

6657406676664 is a wasteful number, since it uses less digits than its factorization.

6657406676664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264440 (or 264436 counting only the distinct ones).

The product of its (nonzero) digits is 1097349120, while the sum is 69.

The spelling of 6657406676664 in words is "six trillion, six hundred fifty-seven billion, four hundred six million, six hundred seventy-six thousand, six hundred sixty-four".