12553666 has 16 divisors (see below), whose sum is σ = 19284480. Its totient is φ = 6127120.

The previous prime is 12553657. The next prime is 12553669. The reversal of 12553666 is 66635521.

It is not an unprimeable number, because it can be changed into a prime (12553669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22260 + ... + 22816.

It is an arithmetic number, because the mean of its divisors is an integer number (1205280).

Almost surely, 2^12553666 is an apocalyptic number.

12553666 is a deficient number, since it is larger than the sum of its proper divisors (6730814).

12553666 is a wasteful number, since it uses less digits than its factorization.

12553666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 809.

The product of its digits is 32400, while the sum is 34.

The square root of 12553666 is about 3543.1152958943. The cubic root of 12553666 is about 232.4110948476.

The spelling of 12553666 in words is "twelve million, five hundred fifty-three thousand, six hundred sixty-six".