6628891280 has 160 divisors (see below), whose sum is σ = 17386887168. Its totient is φ = 2329587200.

The previous prime is 6628891279. The next prime is 6628891303. The reversal of 6628891280 is 821988266.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3431915 + ... + 3433845.

Almost surely, 2^6628891280 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 6628891280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8693443584).

6628891280 is an abundant number, since it is smaller than the sum of its proper divisors (10757995888).

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

6628891280 is a wasteful number, since it uses less digits than its factorization.

6628891280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2085 (or 2079 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 50.

The square root of 6628891280 is about 81418.0034144783. The cubic root of 6628891280 is about 1878.5105223629.

The spelling of 6628891280 in words is "six billion, six hundred twenty-eight million, eight hundred ninety-one thousand, two hundred eighty".