12663878 has 24 divisors (see below), whose sum is σ = 20651112. Its totient is φ = 5803712.

The previous prime is 12663877. The next prime is 12663881. The reversal of 12663878 is 87836621.

It is a happy number.

12663878 is nontrivially palindromic in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12663877) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 118301 + ... + 118407.

It is an arithmetic number, because the mean of its divisors is an integer number (860463).

Almost surely, 2^12663878 is an apocalyptic number.

12663878 is a deficient number, since it is larger than the sum of its proper divisors (7987234).

12663878 is a wasteful number, since it uses less digits than its factorization.

12663878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244 (or 185 counting only the distinct ones).

The product of its digits is 96768, while the sum is 41.

The square root of 12663878 is about 3558.6342886001. The cubic root of 12663878 is about 233.0892472490.

The spelling of 12663878 in words is "twelve million, six hundred sixty-three thousand, eight hundred seventy-eight".