12666969 has 16 divisors (see below), whose sum is σ = 21447040. Its totient is φ = 7238160.

The previous prime is 12666967. The next prime is 12667001. The reversal of 12666969 is 96966621.

It is not a de Polignac number, because 12666969 - 2¹ = 12666967 is a prime.

It is a super-2 number, since 2×12666969² = 320904207293922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12666967) 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, 33322 + ... + 33699.

It is an arithmetic number, because the mean of its divisors is an integer number (1340440).

Almost surely, 2^12666969 is an apocalyptic number.

It is an amenable number.

12666969 is a deficient number, since it is larger than the sum of its proper divisors (8780071).

12666969 is an equidigital number, since it uses as much as digits as its factorization.

12666969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67037 (or 67031 counting only the distinct ones).

The product of its digits is 209952, while the sum is 45.

The square root of 12666969 is about 3559.0685579235. The cubic root of 12666969 is about 233.1082098515.

The spelling of 12666969 in words is "twelve million, six hundred sixty-six thousand, nine hundred sixty-nine".