13364661665 has 8 divisors (see below), whose sum is σ = 16039491048. Its totient is φ = 10690464640.

The previous prime is 13364661659. The next prime is 13364661703. The reversal of 13364661665 is 56616646331.

It can be written as a sum of positive squares in 4 ways, for example, as 10316944 + 13354344721 = 3212^2 + 115561^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13364661665 - 2⁶ = 13364661601 is a prime.

It is a super-2 number, since 2×13364661665² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 110276 + ... + 197205.

It is an arithmetic number, because the mean of its divisors is an integer number (2004936381).

Almost surely, 2^13364661665 is an apocalyptic number.

It is an amenable number.

13364661665 is a deficient number, since it is larger than the sum of its proper divisors (2674829383).

13364661665 is an equidigital number, since it uses as much as digits as its factorization.

13364661665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316179.

The product of its digits is 1399680, while the sum is 47.

The spelling of 13364661665 in words is "thirteen billion, three hundred sixty-four million, six hundred sixty-one thousand, six hundred sixty-five".