12126666 has 16 divisors (see below), whose sum is σ = 24494688. Its totient is φ = 4002000.

The previous prime is 12126643. The next prime is 12126671. The reversal of 12126666 is 66662121.

It is a nude number because it is divisible by every one of its digits.

12126666 is a modest number, since divided by 6666 gives 1212 as remainder.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9400 + ... + 10611.

It is an arithmetic number, because the mean of its divisors is an integer number (1530918).

Almost surely, 2^12126666 is an apocalyptic number.

12126666 is an abundant number, since it is smaller than the sum of its proper divisors (12368022).

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

12126666 is a wasteful number, since it uses less digits than its factorization.

12126666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20117.

The product of its digits is 5184, while the sum is 30.

The square root of 12126666 is about 3482.3362847376. The cubic root of 12126666 is about 229.7455661514.

Adding to 12126666 its reverse (66662121), we get a palindrome (78788787).

The spelling of 12126666 in words is "twelve million, one hundred twenty-six thousand, six hundred sixty-six".