12666625 has 8 divisors (see below), whose sum is σ = 15808104. Its totient is φ = 10133200.

The previous prime is 12666607. The next prime is 12666671. The reversal of 12666625 is 52666621.

It can be written as a sum of positive squares in 4 ways, for example, as 144 + 12666481 = 12^2 + 3559^2 .

It is not a de Polignac number, because 12666625 - 2⁵ = 12666593 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50542 + ... + 50791.

It is an arithmetic number, because the mean of its divisors is an integer number (1976013).

Almost surely, 2^12666625 is an apocalyptic number.

It is an amenable number.

12666625 is a deficient number, since it is larger than the sum of its proper divisors (3141479).

12666625 is an equidigital number, since it uses as much as digits as its factorization.

12666625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101348 (or 101338 counting only the distinct ones).

The product of its digits is 25920, while the sum is 34.

The square root of 12666625 is about 3559.0202303443. The cubic root of 12666625 is about 233.1060996400.

The spelling of 12666625 in words is "twelve million, six hundred sixty-six thousand, six hundred twenty-five".