11665116655 has 16 divisors (see below), whose sum is σ = 14614246080. Its totient is φ = 8921772288.

The previous prime is 11665116649. The next prime is 11665116689. The reversal of 11665116655 is 55661156611.

It is a cyclic number.

It is not a de Polignac number, because 11665116655 - 2⁷ = 11665116527 is a prime.

It is a congruent 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, 208339 + ... + 258331.

It is an arithmetic number, because the mean of its divisors is an integer number (913390380).

Almost surely, 2^11665116655 is an apocalyptic number.

11665116655 is a deficient number, since it is larger than the sum of its proper divisors (2949129425).

11665116655 is a wasteful number, since it uses less digits than its factorization.

11665116655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52050.

The product of its digits is 162000, while the sum is 43.

The spelling of 11665116655 in words is "eleven billion, six hundred sixty-five million, one hundred sixteen thousand, six hundred fifty-five".