6647990508 has 36 divisors (see below), whose sum is σ = 17384115840. Its totient is φ = 2139582816.

The previous prime is 6647990501. The next prime is 6647990567. The reversal of 6647990508 is 8050997466.

6647990508 is a `hidden beast` number, since 6 + 6 + 47 + 9 + 90 + 508 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-3 number, since 3×6647990508³ (a number of 30 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (6647990501) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3182860 + ... + 3184947.

Almost surely, 2^6647990508 is an apocalyptic number.

It is an amenable number.

6647990508 is an abundant number, since it is smaller than the sum of its proper divisors (10736125332).

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

6647990508 is a wasteful number, since it uses less digits than its factorization.

6647990508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6367846 (or 6367841 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 54.

The square root of 6647990508 is about 81535.2102345974. The cubic root of 6647990508 is about 1880.3129202227.

The spelling of 6647990508 in words is "six billion, six hundred forty-seven million, nine hundred ninety thousand, five hundred eight".