12660326013 has 4 divisors (see below), whose sum is σ = 16880434688. Its totient is φ = 8440217340.

The previous prime is 12660326009. The next prime is 12660326017. The reversal of 12660326013 is 31062306621.

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.

It is an interprime number because it is at equal distance from previous prime (12660326009) and next prime (12660326017).

It is not a de Polignac number, because 12660326013 - 2² = 12660326009 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12660326017) 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, 2110054333 + ... + 2110054338.

It is an arithmetic number, because the mean of its divisors is an integer number (4220108672).

Almost surely, 2^12660326013 is an apocalyptic number.

It is an amenable number.

12660326013 is a deficient number, since it is larger than the sum of its proper divisors (4220108675).

12660326013 is an equidigital number, since it uses as much as digits as its factorization.

12660326013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4220108674.

The product of its (nonzero) digits is 7776, while the sum is 30.

The spelling of 12660326013 in words is "twelve billion, six hundred sixty million, three hundred twenty-six thousand, thirteen".