6399866833120 has 48 divisors (see below), whose sum is σ = 15915458316240. Its totient is φ = 2425212693504.

The previous prime is 6399866833111. The next prime is 6399866833183. The reversal of 6399866833120 is 213386689936.

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 7 ways as a sum of consecutive naturals, for example, 1052606637 + ... + 1052612716.

It is an arithmetic number, because the mean of its divisors is an integer number (331572048255).

Almost surely, 2^{6399866833120} is an apocalyptic number.

It is an amenable number.

6399866833120 is an abundant number, since it is smaller than the sum of its proper divisors (9515591483120).

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

6399866833120 is a wasteful number, since it uses less digits than its factorization.

6399866833120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2105219387 (or 2105219379 counting only the distinct ones).

The product of its (nonzero) digits is 60466176, while the sum is 64.

The spelling of 6399866833120 in words is "six trillion, three hundred ninety-nine billion, eight hundred sixty-six million, eight hundred thirty-three thousand, one hundred twenty".