13646665223 has 4 divisors (see below), whose sum is σ = 13664598528. Its totient is φ = 13628731920.

The previous prime is 13646665211. The next prime is 13646665229. The reversal of 13646665223 is 32256664631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32256664631 = 30169 ⋅1069199.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13646665223 is a prime.

It is a super-3 number, since 3×13646665223³ (a number of 31 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13646665229) 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, 8965511 + ... + 8967032.

It is an arithmetic number, because the mean of its divisors is an integer number (3416149632).

Almost surely, 2^13646665223 is an apocalyptic number.

13646665223 is a deficient number, since it is larger than the sum of its proper divisors (17933305).

13646665223 is an equidigital number, since it uses as much as digits as its factorization.

13646665223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17933304.

The product of its digits is 933120, while the sum is 44.

The spelling of 13646665223 in words is "thirteen billion, six hundred forty-six million, six hundred sixty-five thousand, two hundred twenty-three".