12166566 has 16 divisors (see below), whose sum is σ = 24570624. Its totient is φ = 4015944.

The previous prime is 12166547. The next prime is 12166579. The reversal of 12166566 is 66566121.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9226 + ... + 10461.

It is an arithmetic number, because the mean of its divisors is an integer number (1535664).

Almost surely, 2^12166566 is an apocalyptic number.

12166566 is an abundant number, since it is smaller than the sum of its proper divisors (12404058).

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

12166566 is a wasteful number, since it uses less digits than its factorization.

12166566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19795.

The product of its digits is 12960, while the sum is 33.

The square root of 12166566 is about 3488.0604925947. The cubic root of 12166566 is about 229.9972652479.

The spelling of 12166566 in words is "twelve million, one hundred sixty-six thousand, five hundred sixty-six".