12666425 has 12 divisors (see below), whose sum is σ = 15862080. Its totient is φ = 10032720.

The previous prime is 12666421. The next prime is 12666427. The reversal of 12666425 is 52466621.

It is not a de Polignac number, because 12666425 - 2² = 12666421 is a prime.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 12666391 and 12666400.

It is not an unprimeable number, because it can be changed into a prime (12666421) 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, 116 + ... + 5034.

It is an arithmetic number, because the mean of its divisors is an integer number (1321840).

Almost surely, 2^12666425 is an apocalyptic number.

It is an amenable number.

12666425 is a deficient number, since it is larger than the sum of its proper divisors (3195655).

12666425 is a wasteful number, since it uses less digits than its factorization.

12666425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5032 (or 5027 counting only the distinct ones).

The product of its digits is 17280, while the sum is 32.

The square root of 12666425 is about 3558.9921326128. The cubic root of 12666425 is about 233.1048727553.

The spelling of 12666425 in words is "twelve million, six hundred sixty-six thousand, four hundred twenty-five".