12666369 has 16 divisors (see below), whose sum is σ = 17858880. Its totient is φ = 7963200.

The previous prime is 12666361. The next prime is 12666371. The reversal of 12666369 is 96366621.

It is a happy number.

It is not a de Polignac number, because 12666369 - 2³ = 12666361 is a prime.

It is a super-2 number, since 2×12666369² = 320873807288322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12666361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17719 + ... + 18419.

It is an arithmetic number, because the mean of its divisors is an integer number (1116180).

Almost surely, 2^12666369 is an apocalyptic number.

12666369 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

12666369 is a deficient number, since it is larger than the sum of its proper divisors (5192511).

12666369 is a wasteful number, since it uses less digits than its factorization.

12666369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1040.

The product of its digits is 69984, while the sum is 39.

The square root of 12666369 is about 3558.9842652083. The cubic root of 12666369 is about 233.1045292253.

The spelling of 12666369 in words is "twelve million, six hundred sixty-six thousand, three hundred sixty-nine".