6642919288 has 16 divisors (see below), whose sum is σ = 12583882080. Its totient is φ = 3287217408.

The previous prime is 6642919273. The next prime is 6642919291. The reversal of 6642919288 is 8829192466.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4279456 + ... + 4281007.

It is an arithmetic number, because the mean of its divisors is an integer number (786492630).

Almost surely, 2^6642919288 is an apocalyptic number.

It is an amenable number.

6642919288 is a deficient number, since it is larger than the sum of its proper divisors (5940962792).

6642919288 is a wasteful number, since it uses less digits than its factorization.

6642919288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8560566 (or 8560562 counting only the distinct ones).

The product of its digits is 2985984, while the sum is 55.

The square root of 6642919288 is about 81504.1059579209. The cubic root of 6642919288 is about 1879.8346851770.

The spelling of 6642919288 in words is "six billion, six hundred forty-two million, nine hundred nineteen thousand, two hundred eighty-eight".