6721970328 has 160 divisors (see below), whose sum is σ = 20072448000. Its totient is φ = 2095554240.

The previous prime is 6721970303. The next prime is 6721970341. The reversal of 6721970328 is 8230791276.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 969193 + ... + 976103.

It is an arithmetic number, because the mean of its divisors is an integer number (125452800).

Almost surely, 2^6721970328 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 6721970328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10036224000).

6721970328 is an abundant number, since it is smaller than the sum of its proper divisors (13350477672).

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

6721970328 is a wasteful number, since it uses less digits than its factorization.

6721970328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7027 (or 7014 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 45.

The square root of 6721970328 is about 81987.6230171359. The cubic root of 6721970328 is about 1887.2620067340.

The spelling of 6721970328 in words is "six billion, seven hundred twenty-one million, nine hundred seventy thousand, three hundred twenty-eight".