12578663 has 4 divisors (see below), whose sum is σ = 13012440. Its totient is φ = 12144888.

The previous prime is 12578611. The next prime is 12578681. The reversal of 12578663 is 36687521.

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 12578663 - 2⁸ = 12578407 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 (12578603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 216845 + ... + 216902.

It is an arithmetic number, because the mean of its divisors is an integer number (3253110).

Almost surely, 2^12578663 is an apocalyptic number.

12578663 is a deficient number, since it is larger than the sum of its proper divisors (433777).

12578663 is an equidigital number, since it uses as much as digits as its factorization.

12578663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 433776.

The product of its digits is 60480, while the sum is 38.

The square root of 12578663 is about 3546.6410870005. The cubic root of 12578663 is about 232.5652524290.

The spelling of 12578663 in words is "twelve million, five hundred seventy-eight thousand, six hundred sixty-three".