12663553 has 4 divisors (see below), whose sum is σ = 14472640. Its totient is φ = 10854468.

The previous prime is 12663493. The next prime is 12663569. The reversal of 12663553 is 35536621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12663553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12663653) 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, 904533 + ... + 904546.

It is an arithmetic number, because the mean of its divisors is an integer number (3618160).

Almost surely, 2^12663553 is an apocalyptic number.

It is an amenable number.

12663553 is a deficient number, since it is larger than the sum of its proper divisors (1809087).

12663553 is an equidigital number, since it uses as much as digits as its factorization.

12663553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1809086.

The product of its digits is 16200, while the sum is 31.

The square root of 12663553 is about 3558.5886247219. The cubic root of 12663553 is about 233.0872532665.

The spelling of 12663553 in words is "twelve million, six hundred sixty-three thousand, five hundred fifty-three".