665338112 has 108 divisors (see below), whose sum is σ = 1475083260. Its totient is φ = 299487232.

The previous prime is 665338109. The next prime is 665338139. The reversal of 665338112 is 211833566.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 366186496 + 299151616 = 19136^2 + 17296^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28927733 + ... + 28927755.

Almost surely, 2^665338112 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 665338112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (737541630).

665338112 is an abundant number, since it is smaller than the sum of its proper divisors (809745148).

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

665338112 is an frugal number, since it uses more digits than its factorization.

665338112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113 (or 42 counting only the distinct ones).

The product of its digits is 25920, while the sum is 35.

The square root of 665338112 is about 25794.1487938641. The cubic root of 665338112 is about 872.9997791274. Note that the first 3 decimals are identical.

The spelling of 665338112 in words is "six hundred sixty-five million, three hundred thirty-eight thousand, one hundred twelve".