12706669 has 8 divisors (see below), whose sum is σ = 13185720. Its totient is φ = 12244960.

The previous prime is 12706637. The next prime is 12706691. The reversal of 12706669 is 96660721.

It can be written as a sum of positive squares in 4 ways, for example, as 68644 + 12638025 = 262^2 + 3555^2 .

It is not a de Polignac number, because 12706669 - 2⁵ = 12706637 is a prime.

It is a super-2 number, since 2×12706669² = 322918874151122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12706609) 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 7 ways as a sum of consecutive naturals, for example, 24129 + ... + 24649.

It is an arithmetic number, because the mean of its divisors is an integer number (1648215).

Almost surely, 2^12706669 is an apocalyptic number.

It is an amenable number.

12706669 is a deficient number, since it is larger than the sum of its proper divisors (479051).

12706669 is an frugal number, since it uses more digits than its factorization.

12706669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 608 (or 550 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 12706669 is about 3564.6414967006. The cubic root of 12706669 is about 233.3514867962.

The spelling of 12706669 in words is "twelve million, seven hundred six thousand, six hundred sixty-nine".