6621941328 has 20 divisors (see below), whose sum is σ = 17106681888. Its totient is φ = 2207313760.

The previous prime is 6621941297. The next prime is 6621941357. The reversal of 6621941328 is 8231491266.

It is a self number, because there is not a number n which added to its sum of digits gives 6621941328.

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, 68978508 + ... + 68978603.

Almost surely, 2^6621941328 is an apocalyptic number.

It is an amenable number.

6621941328 is an abundant number, since it is smaller than the sum of its proper divisors (10484740560).

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

6621941328 is a wasteful number, since it uses less digits than its factorization.

6621941328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137957122 (or 137957116 counting only the distinct ones).

The product of its digits is 124416, while the sum is 42.

The square root of 6621941328 is about 81375.3115385742. The cubic root of 6621941328 is about 1877.8537949808.

The spelling of 6621941328 in words is "six billion, six hundred twenty-one million, nine hundred forty-one thousand, three hundred twenty-eight".