12006666 has 36 divisors (see below), whose sum is σ = 30263922. Its totient is φ = 3430224.

The previous prime is 12006661. The next prime is 12006671. The reversal of 12006666 is 66660021.

12006666 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (12006661) and next prime (12006671).

It can be written as a sum of positive squares in only one way, i.e., 12006225 + 441 = 3465^2 + 21^2 .

12006666 is a modest number, since divided by 6666 gives 1200 as remainder.

It is not an unprimeable number, because it can be changed into a prime (12006661) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 5925 + ... + 7688.

Almost surely, 2^12006666 is an apocalyptic number.

12006666 is an abundant number, since it is smaller than the sum of its proper divisors (18257256).

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

12006666 is a wasteful number, since it uses less digits than its factorization.

12006666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13635 (or 13625 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 12006666 is about 3465.0636357793. The cubic root of 12006666 is about 228.9852332475.

Adding to 12006666 its reverse (66660021), we get a palindrome (78666687).

The spelling of 12006666 in words is "twelve million, six thousand, six hundred sixty-six".