13665165669 has 10 divisors (see below), whose sum is σ = 20413395750. Its totient is φ = 9110110392.

The previous prime is 13665165659. The next prime is 13665165677. The reversal of 13665165669 is 96656156631.

13665165669 is a `hidden beast` number, since 1 + 3 + 6 + 65 + 16 + 566 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 10288044900 + 3377120769 = 101430^2 + 58113^2 .

It is not a de Polignac number, because 13665165669 - 2¹⁹ = 13664641381 is a prime.

It is a super-2 number, since 2×13665165669² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13665165659) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 84352794 + ... + 84352955.

It is an arithmetic number, because the mean of its divisors is an integer number (2041339575).

Almost surely, 2^13665165669 is an apocalyptic number.

It is an amenable number.

13665165669 is a deficient number, since it is larger than the sum of its proper divisors (6748230081).

13665165669 is an equidigital number, since it uses as much as digits as its factorization.

13665165669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168705761 (or 168705752 counting only the distinct ones).

The product of its digits is 5248800, while the sum is 54.

The spelling of 13665165669 in words is "thirteen billion, six hundred sixty-five million, one hundred sixty-five thousand, six hundred sixty-nine".