6560615156661 has 64 divisors (see below), whose sum is σ = 10232555074560. Its totient is φ = 4148910097920.

The previous prime is 6560615156651. The next prime is 6560615156671. The reversal of 6560615156661 is 1666515160656.

It is an interprime number because it is at equal distance from previous prime (6560615156651) and next prime (6560615156671).

It is not a de Polignac number, because 6560615156661 - 2²² = 6560610962357 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6560615156598 and 6560615156607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6560615156651) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 60852175 + ... + 60959891.

It is an arithmetic number, because the mean of its divisors is an integer number (159883673040).

Almost surely, 2^{6560615156661} is an apocalyptic number.

It is an amenable number.

6560615156661 is a deficient number, since it is larger than the sum of its proper divisors (3671939917899).

6560615156661 is a wasteful number, since it uses less digits than its factorization.

6560615156661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109291 (or 109285 counting only the distinct ones).

The product of its (nonzero) digits is 5832000, while the sum is 54.

The spelling of 6560615156661 in words is "six trillion, five hundred sixty billion, six hundred fifteen million, one hundred fifty-six thousand, six hundred sixty-one".