12664463 has 4 divisors (see below), whose sum is σ = 14473680. Its totient is φ = 10855248.

The previous prime is 12664447. The next prime is 12664481. The reversal of 12664463 is 36446621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36446621 = 919 ⋅39659.

It is a cyclic number.

It is not a de Polignac number, because 12664463 - 2⁴ = 12664447 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 (12664423) 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 3 ways as a sum of consecutive naturals, for example, 904598 + ... + 904611.

It is an arithmetic number, because the mean of its divisors is an integer number (3618420).

Almost surely, 2^12664463 is an apocalyptic number.

12664463 is a deficient number, since it is larger than the sum of its proper divisors (1809217).

12664463 is an equidigital number, since it uses as much as digits as its factorization.

12664463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1809216.

The product of its digits is 20736, while the sum is 32.

The square root of 12664463 is about 3558.7164821042. The cubic root of 12664463 is about 233.0928363315.

The spelling of 12664463 in words is "twelve million, six hundred sixty-four thousand, four hundred sixty-three".