12666669 has 8 divisors (see below), whose sum is σ = 16927680. Its totient is φ = 8425056.

The previous prime is 12666607. The next prime is 12666671. The reversal of 12666669 is 96666621.

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

It is not a de Polignac number, because 12666669 - 2⁸ = 12666413 is a prime.

It is a super-2 number, since 2×12666669² = 320889007111122, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a plaindrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 12666669.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12666679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3249 + ... + 5990.

It is an arithmetic number, because the mean of its divisors is an integer number (2115960).

Almost surely, 2^12666669 is an apocalyptic number.

It is an amenable number.

12666669 is a deficient number, since it is larger than the sum of its proper divisors (4261011).

12666669 is an equidigital number, since it uses as much as digits as its factorization.

12666669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9699.

The product of its digits is 139968, while the sum is 42.

The square root of 12666669 is about 3559.0264118155. The cubic root of 12666669 is about 233.1063695529.

It can be divided in two parts, 126 and 66669, that added together give a triangular number (66795 = T₃₆₅).

The spelling of 12666669 in words is "twelve million, six hundred sixty-six thousand, six hundred sixty-nine".