12966669 has 16 divisors (see below), whose sum is σ = 19411840. Its totient is φ = 8553600.

The previous prime is 12966661. The next prime is 12966703. The reversal of 12966669 is 96666921.

It is not a de Polignac number, because 12966669 - 2³ = 12966661 is a prime.

It is a super-2 number, since 2×12966669² = 336269009911122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12966661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 144 + ... + 5094.

It is an arithmetic number, because the mean of its divisors is an integer number (1213240).

Almost surely, 2^12966669 is an apocalyptic number.

It is an amenable number.

12966669 is a deficient number, since it is larger than the sum of its proper divisors (6445171).

12966669 is an equidigital number, since it uses as much as digits as its factorization.

12966669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5057 (or 5051 counting only the distinct ones).

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

The square root of 12966669 is about 3600.9261308724. The cubic root of 12966669 is about 234.9323420740.

The spelling of 12966669 in words is "twelve million, nine hundred sixty-six thousand, six hundred sixty-nine".