12666804 has 12 divisors (see below), whose sum is σ = 29555904. Its totient is φ = 4222264.

The previous prime is 12666803. The next prime is 12666809. The reversal of 12666804 is 40866621.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12666803) 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 3 ways as a sum of consecutive naturals, for example, 527772 + ... + 527795.

It is an arithmetic number, because the mean of its divisors is an integer number (2462992).

Almost surely, 2^12666804 is an apocalyptic number.

It is an amenable number.

12666804 is an abundant number, since it is smaller than the sum of its proper divisors (16889100).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12666804 is a wasteful number, since it uses less digits than its factorization.

12666804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1055574 (or 1055572 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 12666804 is about 3559.0453776259. The cubic root of 12666804 is about 233.1071976909.

The spelling of 12666804 in words is "twelve million, six hundred sixty-six thousand, eight hundred four".