11613886665 has 16 divisors (see below), whose sum is σ = 18591249600. Its totient is φ = 6191062592.

The previous prime is 11613886633. The next prime is 11613886703. The reversal of 11613886665 is 56668831611.

It is a cyclic number.

It is not a de Polignac number, because 11613886665 - 2⁵ = 11613886633 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 156075 + ... + 218144.

It is an arithmetic number, because the mean of its divisors is an integer number (1161953100).

Almost surely, 2^11613886665 is an apocalyptic number.

11613886665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11613886665 is a deficient number, since it is larger than the sum of its proper divisors (6977362935).

11613886665 is a wasteful number, since it uses less digits than its factorization.

11613886665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376296.

The product of its digits is 1244160, while the sum is 51.

The spelling of 11613886665 in words is "eleven billion, six hundred thirteen million, eight hundred eighty-six thousand, six hundred sixty-five".