6656115600561 has 24 divisors (see below), whose sum is σ = 10543425851520. Its totient is φ = 3722569207392.

The previous prime is 6656115600469. The next prime is 6656115600599. The reversal of 6656115600561 is 1650065116566.

It is not a de Polignac number, because 6656115600561 - 2¹¹ = 6656115598513 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 6656115600561.

It is not an unprimeable number, because it can be changed into a prime (6656113600561) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 481692006 + ... + 481705823.

It is an arithmetic number, because the mean of its divisors is an integer number (439309410480).

Almost surely, 2^{6656115600561} is an apocalyptic number.

It is an amenable number.

6656115600561 is a deficient number, since it is larger than the sum of its proper divisors (3887310250959).

6656115600561 is a wasteful number, since it uses less digits than its factorization.

6656115600561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 963397893 (or 963397886 counting only the distinct ones).

The product of its (nonzero) digits is 972000, while the sum is 48.

The spelling of 6656115600561 in words is "six trillion, six hundred fifty-six billion, one hundred fifteen million, six hundred thousand, five hundred sixty-one".