12666125642 has 32 divisors (see below), whose sum is σ = 19431555264. Its totient is φ = 6191078400.

The previous prime is 12666125581. The next prime is 12666125653. The reversal of 12666125642 is 24652166621.

It is a self number, because there is not a number n which added to its sum of digits gives 12666125642.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5409392 + ... + 5411732.

It is an arithmetic number, because the mean of its divisors is an integer number (607236102).

Almost surely, 2^12666125642 is an apocalyptic number.

12666125642 is a deficient number, since it is larger than the sum of its proper divisors (6765429622).

12666125642 is a wasteful number, since it uses less digits than its factorization.

12666125642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2774.

The product of its digits is 207360, while the sum is 41.

The spelling of 12666125642 in words is "twelve billion, six hundred sixty-six million, one hundred twenty-five thousand, six hundred forty-two".