165568768 has 54 divisors (see below), whose sum is σ = 342003102. Its totient is φ = 79994880.

The previous prime is 165568751. The next prime is 165568787. The reversal of 165568768 is 867865561.

It can be written as a sum of positive squares in only one way, i.e., 130142464 + 35426304 = 11408^2 + 5952^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 245680 + ... + 246352.

Almost surely, 2^165568768 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 165568768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (171001551).

165568768 is an abundant number, since it is smaller than the sum of its proper divisors (176434334).

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

165568768 is an frugal number, since it uses more digits than its factorization.

165568768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 751 (or 706 counting only the distinct ones).

The product of its digits is 2419200, while the sum is 52.

The square root of 165568768 is about 12867.3527969043. The cubic root of 165568768 is about 549.1101511664.

The spelling of 165568768 in words is "one hundred sixty-five million, five hundred sixty-eight thousand, seven hundred sixty-eight".