12664603 has 4 divisors (see below), whose sum is σ = 14473840. Its totient is φ = 10855368.

The previous prime is 12664579. The next prime is 12664607. The reversal of 12664603 is 30646621.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12664603 - 2¹⁷ = 12533531 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12664607) 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, 904608 + ... + 904621.

It is an arithmetic number, because the mean of its divisors is an integer number (3618460).

Almost surely, 2^12664603 is an apocalyptic number.

12664603 is a deficient number, since it is larger than the sum of its proper divisors (1809237).

12664603 is an equidigital number, since it uses as much as digits as its factorization.

12664603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1809236.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 12664603 is about 3558.7361520630. The cubic root of 12664603 is about 233.0936952409.

The spelling of 12664603 in words is "twelve million, six hundred sixty-four thousand, six hundred three".