6560665560 has 48 divisors (see below), whose sum is σ = 21322164240. Its totient is φ = 1749510720.

The previous prime is 6560665549. The next prime is 6560665571. The reversal of 6560665560 is 655660656.

It is an interprime number because it is at equal distance from previous prime (6560665549) and next prime (6560665571).

It is a super-2 number, since 2×6560665560² = 86084665180340227200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9111676 + ... + 9112395.

It is an arithmetic number, because the mean of its divisors is an integer number (444211755).

Almost surely, 2^6560665560 is an apocalyptic number.

6560665560 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6560665560 is an abundant number, since it is smaller than the sum of its proper divisors (14761498680).

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

6560665560 is a wasteful number, since it uses less digits than its factorization.

6560665560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18224088 (or 18224081 counting only the distinct ones).

The product of its (nonzero) digits is 972000, while the sum is 45.

The square root of 6560665560 is about 80997.9355292467. The cubic root of 6560665560 is about 1872.0436311878.

The spelling of 6560665560 in words is "six billion, five hundred sixty million, six hundred sixty-five thousand, five hundred sixty".