12165666 has 32 divisors (see below), whose sum is σ = 25574400. Its totient is φ = 3850704.

The previous prime is 12165661. The next prime is 12165667. The reversal of 12165666 is 66656121.

It is not an unprimeable number, because it can be changed into a prime (12165661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27241 + ... + 27683.

It is an arithmetic number, because the mean of its divisors is an integer number (799200).

Almost surely, 2^12165666 is an apocalyptic number.

12165666 is an abundant number, since it is smaller than the sum of its proper divisors (13408734).

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

12165666 is a wasteful number, since it uses less digits than its factorization.

12165666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 670.

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

The square root of 12165666 is about 3487.9314786848. The cubic root of 12165666 is about 229.9915938957.

The spelling of 12165666 in words is "twelve million, one hundred sixty-five thousand, six hundred sixty-six".