13396666817 has 4 divisors (see below), whose sum is σ = 13596617136. Its totient is φ = 13196716500.

The previous prime is 13396666769. The next prime is 13396666831. The reversal of 13396666817 is 71866669331.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 71866669331 = 23 ⋅3124637797.

It is a cyclic number.

It is not a de Polignac number, because 13396666817 - 2⁶ = 13396666753 is a prime.

It is a super-2 number, since 2×13396666817² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13396666837) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99975059 + ... + 99975192.

It is an arithmetic number, because the mean of its divisors is an integer number (3399154284).

Almost surely, 2^13396666817 is an apocalyptic number.

It is an amenable number.

13396666817 is a deficient number, since it is larger than the sum of its proper divisors (199950319).

13396666817 is an equidigital number, since it uses as much as digits as its factorization.

13396666817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199950318.

The product of its digits is 5878656, while the sum is 56.

The spelling of 13396666817 in words is "thirteen billion, three hundred ninety-six million, six hundred sixty-six thousand, eight hundred seventeen".