6657480639 has 20 divisors (see below), whose sum is σ = 9967628616. Its totient is φ = 4428277776.

The previous prime is 6657480629. The next prime is 6657480703. The reversal of 6657480639 is 9360847566.

6657480639 is a `hidden beast` number, since 6 + 6 + 574 + 8 + 0 + 63 + 9 = 666.

It is not a de Polignac number, because 6657480639 - 2⁸ = 6657480383 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6657480629) by changing a digit.

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 19 ways as a sum of consecutive naturals, for example, 56884 + ... + 128649.

Almost surely, 2^6657480639 is an apocalyptic number.

6657480639 is a deficient number, since it is larger than the sum of its proper divisors (3310147977).

6657480639 is a wasteful number, since it uses less digits than its factorization.

6657480639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185988 (or 185979 counting only the distinct ones).

The product of its (nonzero) digits is 6531840, while the sum is 54.

The square root of 6657480639 is about 81593.3860003371. The cubic root of 6657480639 is about 1881.2072221205.

The spelling of 6657480639 in words is "six billion, six hundred fifty-seven million, four hundred eighty thousand, six hundred thirty-nine".