13295665665 has 24 divisors (see below), whose sum is σ = 23166494208. Its totient is φ = 7053891360.

The previous prime is 13295665597. The next prime is 13295665667. The reversal of 13295665665 is 56656659231.

13295665665 is a `hidden beast` number, since 1 + 3 + 29 + 56 + 6 + 566 + 5 = 666.

It is not a de Polignac number, because 13295665665 - 2¹¹ = 13295663617 is a prime.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13295665667) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 764859 + ... + 782048.

It is an arithmetic number, because the mean of its divisors is an integer number (965270592).

Almost surely, 2^13295665665 is an apocalyptic number.

13295665665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13295665665 is a deficient number, since it is larger than the sum of its proper divisors (9870828543).

13295665665 is a wasteful number, since it uses less digits than its factorization.

13295665665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1547109 (or 1547106 counting only the distinct ones).

The product of its digits is 8748000, while the sum is 54.

The spelling of 13295665665 in words is "thirteen billion, two hundred ninety-five million, six hundred sixty-five thousand, six hundred sixty-five".