12666255393 has 16 divisors (see below), whose sum is σ = 18448814016. Its totient is φ = 7666031040.

The previous prime is 12666255389. The next prime is 12666255401. The reversal of 12666255393 is 39355266621.

It is not a de Polignac number, because 12666255393 - 2² = 12666255389 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12666255313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 237630 + ... + 286007.

It is an arithmetic number, because the mean of its divisors is an integer number (1153050876).

Almost surely, 2^12666255393 is an apocalyptic number.

It is an amenable number.

12666255393 is a deficient number, since it is larger than the sum of its proper divisors (5782558623).

12666255393 is a wasteful number, since it uses less digits than its factorization.

12666255393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 524384.

The product of its digits is 1749600, while the sum is 48.

The spelling of 12666255393 in words is "twelve billion, six hundred sixty-six million, two hundred fifty-five thousand, three hundred ninety-three".