12642899166 has 24 divisors (see below), whose sum is σ = 27551295720. Its totient is φ = 4189938576.

The previous prime is 12642899153. The next prime is 12642899179. The reversal of 12642899166 is 66199824621.

12642899166 is a `hidden beast` number, since 126 + 428 + 9 + 91 + 6 + 6 = 666.

It is an interprime number because it is at equal distance from previous prime (12642899153) and next prime (12642899179).

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 2026896 + ... + 2033123.

It is an arithmetic number, because the mean of its divisors is an integer number (1147970655).

Almost surely, 2^12642899166 is an apocalyptic number.

12642899166 is an abundant number, since it is smaller than the sum of its proper divisors (14908396554).

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

12642899166 is a wasteful number, since it uses less digits than its factorization.

12642899166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4060200 (or 4060197 counting only the distinct ones).

The product of its digits is 2239488, while the sum is 54.

The spelling of 12642899166 in words is "twelve billion, six hundred forty-two million, eight hundred ninety-nine thousand, one hundred sixty-six".