12664998 has 20 divisors (see below), whose sum is σ = 28379340. Its totient is φ = 4221612.

The previous prime is 12664997. The next prime is 12665041. The reversal of 12664998 is 89946621.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12664991) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 38928 + ... + 39251.

It is an arithmetic number, because the mean of its divisors is an integer number (1418967).

Almost surely, 2^12664998 is an apocalyptic number.

12664998 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

12664998 is an abundant number, since it is smaller than the sum of its proper divisors (15714342).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12664998 is an equidigital number, since it uses as much as digits as its factorization.

12664998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78193 (or 78184 counting only the distinct ones).

The product of its digits is 186624, while the sum is 45.

The square root of 12664998 is about 3558.7916488606. The cubic root of 12664998 is about 233.0961185581.

The spelling of 12664998 in words is "twelve million, six hundred sixty-four thousand, nine hundred ninety-eight".