6699972568464 has 360 divisors, whose sum is σ = 21717190913600. Its totient is φ = 1888881638400.

The previous prime is 6699972568459. The next prime is 6699972568507. The reversal of 6699972568464 is 4648652799966.

6699972568464 is a `hidden beast` number, since 6 + 6 + 9 + 9 + 9 + 7 + 2 + 568 + 46 + 4 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 3588629259 + ... + 3588631125.

Almost surely, 2^{6699972568464} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6699972568464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10858595456800).

6699972568464 is an abundant number, since it is smaller than the sum of its proper divisors (15017218345136).

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

6699972568464 is a wasteful number, since it uses less digits than its factorization.

6699972568464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2439 (or 2329 counting only the distinct ones).

The product of its digits is 8465264640, while the sum is 81.

The spelling of 6699972568464 in words is "six trillion, six hundred ninety-nine billion, nine hundred seventy-two million, five hundred sixty-eight thousand, four hundred sixty-four".