12666634 has 4 divisors (see below), whose sum is σ = 18999954. Its totient is φ = 6333316.

The previous prime is 12666607. The next prime is 12666671. The reversal of 12666634 is 43666621.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 9954025 + 2712609 = 3155^2 + 1647^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 12666634.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3166657 + ... + 3166660.

Almost surely, 2^12666634 is an apocalyptic number.

12666634 is a deficient number, since it is larger than the sum of its proper divisors (6333320).

12666634 is an equidigital number, since it uses as much as digits as its factorization.

12666634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6333319.

The product of its digits is 31104, while the sum is 34.

The square root of 12666634 is about 3559.0214947370. The cubic root of 12666634 is about 233.1061548495.

The spelling of 12666634 in words is "twelve million, six hundred sixty-six thousand, six hundred thirty-four".