12666449 has 8 divisors (see below), whose sum is σ = 12929280. Its totient is φ = 12406176.

The previous prime is 12666439. The next prime is 12666461. The reversal of 12666449 is 94466621.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12666449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12666439) 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, 11672 + ... + 12710.

It is an arithmetic number, because the mean of its divisors is an integer number (1616160).

Almost surely, 2^12666449 is an apocalyptic number.

It is an amenable number.

12666449 is a deficient number, since it is larger than the sum of its proper divisors (262831).

12666449 is a wasteful number, since it uses less digits than its factorization.

12666449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1279.

The product of its digits is 62208, while the sum is 38.

The square root of 12666449 is about 3558.9955043523. The cubic root of 12666449 is about 233.1050199822.

The spelling of 12666449 in words is "twelve million, six hundred sixty-six thousand, four hundred forty-nine".