12668407 has 4 divisors (see below), whose sum is σ = 12725440. Its totient is φ = 12611376.

The previous prime is 12668399. The next prime is 12668413. The reversal of 12668407 is 70486621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70486621 = 1367 ⋅51563.

It is a cyclic number.

It is not a de Polignac number, because 12668407 - 2³ = 12668399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12668477) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28182 + ... + 28627.

It is an arithmetic number, because the mean of its divisors is an integer number (3181360).

Almost surely, 2^12668407 is an apocalyptic number.

12668407 is a deficient number, since it is larger than the sum of its proper divisors (57033).

12668407 is an equidigital number, since it uses as much as digits as its factorization.

12668407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57032.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 12668407 is about 3559.2705713390. The cubic root of 12668407 is about 233.1170306126.

The spelling of 12668407 in words is "twelve million, six hundred sixty-eight thousand, four hundred seven".