12686066 has 4 divisors (see below), whose sum is σ = 19029102. Its totient is φ = 6343032.

The previous prime is 12686059. The next prime is 12686081. The reversal of 12686066 is 66068621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66068621 = 2789 ⋅23689.

It can be written as a sum of positive squares in only one way, i.e., 6786025 + 5900041 = 2605^2 + 2429^2 .

It is a Curzon number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 3171515 + ... + 3171518.

Almost surely, 2^12686066 is an apocalyptic number.

12686066 is a deficient number, since it is larger than the sum of its proper divisors (6343036).

12686066 is an equidigital number, since it uses as much as digits as its factorization.

12686066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6343035.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 12686066 is about 3561.7504123675. The cubic root of 12686066 is about 233.2252973781.

The spelling of 12686066 in words is "twelve million, six hundred eighty-six thousand, sixty-six".