12666422 has 8 divisors (see below), whose sum is σ = 19825776. Its totient is φ = 6057832.

The previous prime is 12666421. The next prime is 12666427. The reversal of 12666422 is 22466621.

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 (12666421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137633 + ... + 137724.

It is an arithmetic number, because the mean of its divisors is an integer number (2478222).

Almost surely, 2^12666422 is an apocalyptic number.

12666422 is a deficient number, since it is larger than the sum of its proper divisors (7159354).

12666422 is a wasteful number, since it uses less digits than its factorization.

12666422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275382.

The product of its digits is 6912, while the sum is 29.

The square root of 12666422 is about 3558.9917111452. The cubic root of 12666422 is about 233.1048543519.

The spelling of 12666422 in words is "twelve million, six hundred sixty-six thousand, four hundred twenty-two".