12311666 has 8 divisors (see below), whose sum is σ = 18488064. Its totient is φ = 6148980.

The previous prime is 12311657. The next prime is 12311671. The reversal of 12311666 is 66611321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 770 + ... + 5021.

It is an arithmetic number, because the mean of its divisors is an integer number (2311008).

Almost surely, 2^12311666 is an apocalyptic number.

12311666 is a deficient number, since it is larger than the sum of its proper divisors (6176398).

12311666 is a wasteful number, since it uses less digits than its factorization.

12311666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6856.

The product of its digits is 1296, while the sum is 26.

The square root of 12311666 is about 3508.7983698127. The cubic root of 12311666 is about 230.9079798146.

Adding to 12311666 its reverse (66611321), we get a palindrome (78922987).

The spelling of 12311666 in words is "twelve million, three hundred eleven thousand, six hundred sixty-six".