6388166880 has 72 divisors (see below), whose sum is σ = 21799624392. Its totient is φ = 1703510784.

The previous prime is 6388166879. The next prime is 6388166933. The reversal of 6388166880 is 886618836.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2216674 + ... + 2219553.

It is an arithmetic number, because the mean of its divisors is an integer number (302772561).

Almost surely, 2^6388166880 is an apocalyptic number.

6388166880 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6388166880 is an abundant number, since it is smaller than the sum of its proper divisors (15411457512).

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

6388166880 is a wasteful number, since it uses less digits than its factorization.

6388166880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4436248 (or 4436237 counting only the distinct ones).

The product of its (nonzero) digits is 2654208, while the sum is 54.

The square root of 6388166880 is about 79926.0087831239. The cubic root of 6388166880 is about 1855.4905675517.

The spelling of 6388166880 in words is "six billion, three hundred eighty-eight million, one hundred sixty-six thousand, eight hundred eighty".