666007212 has 24 divisors (see below), whose sum is σ = 1673556976. Its totient is φ = 204925248.

The previous prime is 666007207. The next prime is 666007213. The reversal of 666007212 is 212700666.

It is a self number, because there is not a number n which added to its sum of digits gives 666007212.

It is not an unprimeable number, because it can be changed into a prime (666007213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2134483 + ... + 2134794.

Almost surely, 2^666007212 is an apocalyptic number.

It is an amenable number.

666007212 is an abundant number, since it is smaller than the sum of its proper divisors (1007549764).

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

666007212 is a wasteful number, since it uses less digits than its factorization.

666007212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4269297 (or 4269295 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 666007212 is about 25807.1155304114. The cubic root of 666007212 is about 873.2923263512.

Adding to 666007212 its reverse (212700666), we get a palindrome (878707878).

The spelling of 666007212 in words is "six hundred sixty-six million, seven thousand, two hundred twelve".