666304112 has 20 divisors (see below), whose sum is σ = 1347093840. Its totient is φ = 318667008.

The previous prime is 666304099. The next prime is 666304139. The reversal of 666304112 is 211403666.

It is a happy number.

It is a super-2 number, since 2×666304112² = 887922339336217088, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 904937 + ... + 905672.

It is an arithmetic number, because the mean of its divisors is an integer number (67354692).

Almost surely, 2^666304112 is an apocalyptic number.

It is an amenable number.

666304112 is an abundant number, since it is smaller than the sum of its proper divisors (680789728).

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

666304112 is a wasteful number, since it uses less digits than its factorization.

666304112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1810640 (or 1810634 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 666304112 is about 25812.8671789865. The cubic root of 666304112 is about 873.4220756834.

Adding to 666304112 its reverse (211403666), we get a palindrome (877707778).

The spelling of 666304112 in words is "six hundred sixty-six million, three hundred four thousand, one hundred twelve".