12665086415 has 4 divisors (see below), whose sum is σ = 15198103704. Its totient is φ = 10132069128.

The previous prime is 12665086403. The next prime is 12665086439. The reversal of 12665086415 is 51468056621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51468056621 = 31 ⋅1660259891.

It is a cyclic number.

It is not a de Polignac number, because 12665086415 - 2¹⁴ = 12665070031 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1266508637 + ... + 1266508646.

It is an arithmetic number, because the mean of its divisors is an integer number (3799525926).

Almost surely, 2^12665086415 is an apocalyptic number.

12665086415 is a deficient number, since it is larger than the sum of its proper divisors (2533017289).

12665086415 is an equidigital number, since it uses as much as digits as its factorization.

12665086415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2533017288.

The product of its (nonzero) digits is 345600, while the sum is 44.

The spelling of 12665086415 in words is "twelve billion, six hundred sixty-five million, eighty-six thousand, four hundred fifteen".