11566662061115 has 16 divisors (see below), whose sum is σ = 15870358193088. Its totient is φ = 7927671730176.

The previous prime is 11566662061111. The next prime is 11566662061121. The reversal of 11566662061115 is 51116026666511.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 11566662061115 - 2² = 11566662061111 is a prime.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 11566662061115.

It is not an unprimeable number, because it can be changed into a prime (11566662061111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78126722 + ... + 78274631.

It is an arithmetic number, because the mean of its divisors is an integer number (991897387068).

Almost surely, 2^{11566662061115} is an apocalyptic number.

11566662061115 is a deficient number, since it is larger than the sum of its proper divisors (4303696131973).

11566662061115 is a wasteful number, since it uses less digits than its factorization.

11566662061115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156403478.

The product of its (nonzero) digits is 388800, while the sum is 47.

The spelling of 11566662061115 in words is "eleven trillion, five hundred sixty-six billion, six hundred sixty-two million, sixty-one thousand, one hundred fifteen".