6651901328 has 40 divisors (see below), whose sum is σ = 13088875800. Its totient is φ = 3274297344.

The previous prime is 6651901327. The next prime is 6651901331. The reversal of 6651901328 is 8231091566.

It can be written as a sum of positive squares in 4 ways, for example, as 2155930624 + 4495970704 = 46432^2 + 67052^2 .

It is not an unprimeable number, because it can be changed into a prime (6651901327) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 659588 + ... + 669596.

It is an arithmetic number, because the mean of its divisors is an integer number (327221895).

Almost surely, 2^6651901328 is an apocalyptic number.

It is an amenable number.

6651901328 is a deficient number, since it is larger than the sum of its proper divisors (6436974472).

6651901328 is a wasteful number, since it uses less digits than its factorization.

6651901328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10659 (or 10653 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 41.

The square root of 6651901328 is about 81559.1891082789. The cubic root of 6651901328 is about 1880.6815591307.

The spelling of 6651901328 in words is "six billion, six hundred fifty-one million, nine hundred one thousand, three hundred twenty-eight".