12665772288 has 108 divisors (see below), whose sum is σ = 39327755740. Its totient is φ = 3897151488.

The previous prime is 12665772283. The next prime is 12665772307. The reversal of 12665772288 is 88227756621.

12665772288 is a `hidden beast` number, since 1 + 2 + 66 + 577 + 2 + 2 + 8 + 8 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 2707329024 + 9958443264 = 52032^2 + 99792^2 .

It is not an unprimeable number, because it can be changed into a prime (12665772281) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 181483 + ... + 241386.

Almost surely, 2^12665772288 is an apocalyptic number.

12665772288 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

12665772288 is an abundant number, since it is smaller than the sum of its proper divisors (26661983452).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12665772288 is a wasteful number, since it uses less digits than its factorization.

12665772288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422904 (or 422887 counting only the distinct ones).

The product of its digits is 4515840, while the sum is 54.

The spelling of 12665772288 in words is "twelve billion, six hundred sixty-five million, seven hundred seventy-two thousand, two hundred eighty-eight".