12665566353 has 32 divisors (see below), whose sum is σ = 18787023360. Its totient is φ = 7525762560.

The previous prime is 12665566327. The next prime is 12665566387. The reversal of 12665566353 is 35366556621.

It is not a de Polignac number, because 12665566353 - 2¹⁰ = 12665565329 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12665566313) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 324018 + ... + 360996.

It is an arithmetic number, because the mean of its divisors is an integer number (587094480).

Almost surely, 2^12665566353 is an apocalyptic number.

It is an amenable number.

12665566353 is a deficient number, since it is larger than the sum of its proper divisors (6121457007).

12665566353 is a wasteful number, since it uses less digits than its factorization.

12665566353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37197.

The product of its digits is 2916000, while the sum is 48.

The spelling of 12665566353 in words is "twelve billion, six hundred sixty-five million, five hundred sixty-six thousand, three hundred fifty-three".