12204666 has 12 divisors (see below), whose sum is σ = 26443482. Its totient is φ = 4068216.

The previous prime is 12204641. The next prime is 12204671. The reversal of 12204666 is 66640221.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 10017225 + 2187441 = 3165^2 + 1479^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 339001 + ... + 339036.

Almost surely, 2^12204666 is an apocalyptic number.

12204666 is an abundant number, since it is smaller than the sum of its proper divisors (14238816).

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

12204666 is a wasteful number, since it uses less digits than its factorization.

12204666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 678045 (or 678042 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 12204666 is about 3493.5177114193. The cubic root of 12204666 is about 230.2370963990.

Adding to 12204666 its reverse (66640221), we get a palindrome (78844887).

It can be divided in two parts, 1220 and 4666, that added together give a triangular number (5886 = T₁₀₈).

The spelling of 12204666 in words is "twelve million, two hundred four thousand, six hundred sixty-six".