12665446 has 4 divisors (see below), whose sum is σ = 18998172. Its totient is φ = 6332722.

The previous prime is 12665441. The next prime is 12665449. The reversal of 12665446 is 64456621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 64456621 = 3739 ⋅17239.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12665441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3166360 + ... + 3166363.

It is an arithmetic number, because the mean of its divisors is an integer number (4749543).

Almost surely, 2^12665446 is an apocalyptic number.

12665446 is a deficient number, since it is larger than the sum of its proper divisors (6332726).

12665446 is an equidigital number, since it uses as much as digits as its factorization.

12665446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6332725.

The product of its digits is 34560, while the sum is 34.

The square root of 12665446 is about 3558.8545910166. The cubic root of 12665446 is about 233.0988669683.

The spelling of 12665446 in words is "twelve million, six hundred sixty-five thousand, four hundred forty-six".