12666869808 has 20 divisors (see below), whose sum is σ = 32722747128. Its totient is φ = 4222289920.

The previous prime is 12666869797. The next prime is 12666869819. The reversal of 12666869808 is 80896866621.

It is an interprime number because it is at equal distance from previous prime (12666869797) and next prime (12666869819).

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, 131946513 + ... + 131946608.

Almost surely, 2^12666869808 is an apocalyptic number.

It is an amenable number.

12666869808 is an abundant number, since it is smaller than the sum of its proper divisors (20055877320).

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

12666869808 is a wasteful number, since it uses less digits than its factorization.

12666869808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263893132 (or 263893126 counting only the distinct ones).

The product of its (nonzero) digits is 11943936, while the sum is 60.

The spelling of 12666869808 in words is "twelve billion, six hundred sixty-six million, eight hundred sixty-nine thousand, eight hundred eight".