12664087 has 4 divisors (see below), whose sum is σ = 12789576. Its totient is φ = 12538600.

The previous prime is 12664079. The next prime is 12664109. The reversal of 12664087 is 78046621.

12664087 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78046621 = 1069 ⋅73009.

It is a cyclic number.

It is not a de Polignac number, because 12664087 - 2³ = 12664079 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 (12664037) 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, 62593 + ... + 62794.

It is an arithmetic number, because the mean of its divisors is an integer number (3197394).

Almost surely, 2^12664087 is an apocalyptic number.

12664087 is a deficient number, since it is larger than the sum of its proper divisors (125489).

12664087 is a wasteful number, since it uses less digits than its factorization.

12664087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125488.

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

The square root of 12664087 is about 3558.6636536768. The cubic root of 12664087 is about 233.0905295151.

The spelling of 12664087 in words is "twelve million, six hundred sixty-four thousand, eighty-seven".