665838112 has 24 divisors (see below), whose sum is σ = 1312137036. Its totient is φ = 332596992.

The previous prime is 665838097. The next prime is 665838113. The reversal of 665838112 is 211838566.

665838112 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 665433616 + 404496 = 25796^2 + 636^2 .

It is not an unprimeable number, because it can be changed into a prime (665838113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25458 + ... + 44494.

Almost surely, 2^665838112 is an apocalyptic number.

It is an amenable number.

665838112 is a deficient number, since it is larger than the sum of its proper divisors (646298924).

665838112 is a wasteful number, since it uses less digits than its factorization.

665838112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20140 (or 20132 counting only the distinct ones).

The product of its digits is 69120, while the sum is 40.

The square root of 665838112 is about 25803.8390942123. The cubic root of 665838112 is about 873.2184101184.

The spelling of 665838112 in words is "six hundred sixty-five million, eight hundred thirty-eight thousand, one hundred twelve".