12664465 has 20 divisors (see below), whose sum is σ = 16813620. Its totient is φ = 9157280.

The previous prime is 12664447. The next prime is 12664481. The reversal of 12664465 is 56446621.

It can be written as a sum of positive squares in 2 ways, for example, as 8433216 + 4231249 = 2904^2 + 2057^2 .

It is a de Polignac number, because none of the positive numbers 2^k-12664465 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12664465.

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 in 19 ways as a sum of consecutive naturals, for example, 73119 + ... + 73291.

It is an arithmetic number, because the mean of its divisors is an integer number (840681).

Almost surely, 2^12664465 is an apocalyptic number.

It is an amenable number.

12664465 is a deficient number, since it is larger than the sum of its proper divisors (4149155).

12664465 is an frugal number, since it uses more digits than its factorization.

12664465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222 (or 189 counting only the distinct ones).

The product of its digits is 34560, while the sum is 34.

The square root of 12664465 is about 3558.7167631044. The cubic root of 12664465 is about 233.0928486017.

The spelling of 12664465 in words is "twelve million, six hundred sixty-four thousand, four hundred sixty-five".