12663998 has 8 divisors (see below), whose sum is σ = 19459440. Its totient is φ = 6177520.

The previous prime is 12663991. The next prime is 12664019. The reversal of 12663998 is 89936621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12663991) 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, 77138 + ... + 77301.

It is an arithmetic number, because the mean of its divisors is an integer number (2432430).

Almost surely, 2^12663998 is an apocalyptic number.

12663998 is a deficient number, since it is larger than the sum of its proper divisors (6795442).

12663998 is a wasteful number, since it uses less digits than its factorization.

12663998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154482.

The product of its digits is 139968, while the sum is 44.

The square root of 12663998 is about 3558.6511489608. The cubic root of 12663998 is about 233.0899834801.

The spelling of 12663998 in words is "twelve million, six hundred sixty-three thousand, nine hundred ninety-eight".