6651560656 has 20 divisors (see below), whose sum is σ = 13878737572. Its totient is φ = 3069950976.

The previous prime is 6651560627. The next prime is 6651560659. The reversal of 6651560656 is 6560651566.

It can be written as a sum of positive squares in 2 ways, for example, as 3938817600 + 2712743056 = 62760^2 + 52084^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6651560659) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15989121 + ... + 15989536.

Almost surely, 2^6651560656 is an apocalyptic number.

It is an amenable number.

6651560656 is an abundant number, since it is smaller than the sum of its proper divisors (7227176916).

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

6651560656 is a wasteful number, since it uses less digits than its factorization.

6651560656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31978678 (or 31978672 counting only the distinct ones).

The product of its (nonzero) digits is 972000, while the sum is 46.

The square root of 6651560656 is about 81557.1005860311. The cubic root of 6651560656 is about 1880.6494526970.

The spelling of 6651560656 in words is "six billion, six hundred fifty-one million, five hundred sixty thousand, six hundred fifty-six".