12018666 has 16 divisors (see below), whose sum is σ = 26222688. Its totient is φ = 3642000.

The previous prime is 12018653. The next prime is 12018679. The reversal of 12018666 is 66681021.

It is an interprime number because it is at equal distance from previous prime (12018653) and next prime (12018679).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90985 + ... + 91116.

It is an arithmetic number, because the mean of its divisors is an integer number (1638918).

Almost surely, 2^12018666 is an apocalyptic number.

12018666 is an abundant number, since it is smaller than the sum of its proper divisors (14204022).

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

12018666 is a wasteful number, since it uses less digits than its factorization.

12018666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182117.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 12018666 is about 3466.7947732740. The cubic root of 12018666 is about 229.0614938812.

Adding to 12018666 its reverse (66681021), we get a palindrome (78699687).

The spelling of 12018666 in words is "twelve million, eighteen thousand, six hundred sixty-six".