6870388664 has 16 divisors (see below), whose sum is σ = 12898153800. Its totient is φ = 3430880992.

The previous prime is 6870388639. The next prime is 6870388691. The reversal of 6870388664 is 4668830786.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 532394 + ... + 545145.

Almost surely, 2^6870388664 is an apocalyptic number.

It is an amenable number.

6870388664 is a deficient number, since it is larger than the sum of its proper divisors (6027765136).

6870388664 is a wasteful number, since it uses less digits than its factorization.

6870388664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1078342 (or 1078338 counting only the distinct ones).

The product of its (nonzero) digits is 9289728, while the sum is 56.

The square root of 6870388664 is about 82887.8076920846. The cubic root of 6870388664 is about 1901.0510033770.

The spelling of 6870388664 in words is "six billion, eight hundred seventy million, three hundred eighty-eight thousand, six hundred sixty-four".