11665500165 has 48 divisors (see below), whose sum is σ = 22150155456. Its totient is φ = 5632473600.

The previous prime is 11665500139. The next prime is 11665500211. The reversal of 11665500165 is 56100556611.

It is not a de Polignac number, because 11665500165 - 2⁹ = 11665499653 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 70402 + ... + 168188.

It is an arithmetic number, because the mean of its divisors is an integer number (461461572).

Almost surely, 2^11665500165 is an apocalyptic number.

11665500165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11665500165 is a deficient number, since it is larger than the sum of its proper divisors (10484655291).

11665500165 is a wasteful number, since it uses less digits than its factorization.

11665500165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98050 (or 98047 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 36.

The spelling of 11665500165 in words is "eleven billion, six hundred sixty-five million, five hundred thousand, one hundred sixty-five".