12664218 has 32 divisors (see below), whose sum is σ = 30651264. Its totient is φ = 3405312.

The previous prime is 12664217. The next prime is 12664247. The reversal of 12664218 is 81246621.

12664218 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a super-4 number, since 4×12664218⁴ (a number of 30 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (12664217) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8155 + ... + 9582.

It is an arithmetic number, because the mean of its divisors is an integer number (957852).

Almost surely, 2^12664218 is an apocalyptic number.

12664218 is an abundant number, since it is smaller than the sum of its proper divisors (17987046).

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

12664218 is a wasteful number, since it uses less digits than its factorization.

12664218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17766.

The product of its digits is 4608, while the sum is 30.

The square root of 12664218 is about 3558.6820594147. The cubic root of 12664218 is about 233.0913332250.

The spelling of 12664218 in words is "twelve million, six hundred sixty-four thousand, two hundred eighteen".