12664422 has 24 divisors (see below), whose sum is σ = 29054376. Its totient is φ = 3973056.

The previous prime is 12664373. The next prime is 12664423. The reversal of 12664422 is 22446621.

12664422 is a `hidden beast` number, since 12 + 6 + 644 + 2 + 2 = 666.

12664422 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 congruent number.

It is not an unprimeable number, because it can be changed into a prime (12664423) 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, 20388 + ... + 20999.

It is an arithmetic number, because the mean of its divisors is an integer number (1210599).

Almost surely, 2^12664422 is an apocalyptic number.

12664422 is an abundant number, since it is smaller than the sum of its proper divisors (16389954).

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

12664422 is a wasteful number, since it uses less digits than its factorization.

12664422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41412 (or 41409 counting only the distinct ones).

The product of its digits is 4608, while the sum is 27.

The square root of 12664422 is about 3558.7107215957. The cubic root of 12664422 is about 233.0925847926.

The spelling of 12664422 in words is "twelve million, six hundred sixty-four thousand, four hundred twenty-two".