12666622525 has 24 divisors (see below), whose sum is σ = 15853226400. Its totient is φ = 10038974400.

The previous prime is 12666622499. The next prime is 12666622543. The reversal of 12666622525 is 52522666621.

It is not a de Polignac number, because 12666622525 - 2⁹ = 12666622013 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2155291 + ... + 2161159.

It is an arithmetic number, because the mean of its divisors is an integer number (660551100).

Almost surely, 2^12666622525 is an apocalyptic number.

It is an amenable number.

12666622525 is a deficient number, since it is larger than the sum of its proper divisors (3186603875).

12666622525 is a wasteful number, since it uses less digits than its factorization.

12666622525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6669 (or 6664 counting only the distinct ones).

The product of its digits is 518400, while the sum is 43.

The spelling of 12666622525 in words is "twelve billion, six hundred sixty-six million, six hundred twenty-two thousand, five hundred twenty-five".