13666225 has 12 divisors (see below), whose sum is σ = 17838640. Its totient is φ = 10357200.

The previous prime is 13666223. The next prime is 13666231. The reversal of 13666225 is 52266631.

It is not a de Polignac number, because 13666225 - 2¹ = 13666223 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13666223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13911 + ... + 14860.

Almost surely, 2^13666225 is an apocalyptic number.

It is an amenable number.

13666225 is a deficient number, since it is larger than the sum of its proper divisors (4172415).

13666225 is a wasteful number, since it uses less digits than its factorization.

13666225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28800 (or 28795 counting only the distinct ones).

The product of its digits is 12960, while the sum is 31.

The square root of 13666225 is about 3696.7857660405. The cubic root of 13666225 is about 239.0834544550.

The spelling of 13666225 in words is "thirteen million, six hundred sixty-six thousand, two hundred twenty-five".