665283168 has 216 divisors, whose sum is σ = 2203811064. Its totient is φ = 189573120.

The previous prime is 665283149. The next prime is 665283169. The reversal of 665283168 is 861382566.

665283168 is a `hidden beast` number, since 66 + 528 + 3 + 1 + 68 = 666.

665283168 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665283169) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 591855 + ... + 592977.

It is an arithmetic number, because the mean of its divisors is an integer number (10202829).

Almost surely, 2^665283168 is an apocalyptic number.

665283168 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 665283168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1101905532).

665283168 is an abundant number, since it is smaller than the sum of its proper divisors (1538527896).

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

665283168 is a wasteful number, since it uses less digits than its factorization.

665283168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1178 (or 1156 counting only the distinct ones).

The product of its digits is 414720, while the sum is 45.

The square root of 665283168 is about 25793.0837241304. The cubic root of 665283168 is about 872.9757475264.

It can be divided in two parts, 66528 and 3168, that added together give a palindrome (69696).

The spelling of 665283168 in words is "six hundred sixty-five million, two hundred eighty-three thousand, one hundred sixty-eight".