520165668 has 96 divisors (see below), whose sum is σ = 1368525312. Its totient is φ = 152409600.

The previous prime is 520165637. The next prime is 520165669. The reversal of 520165668 is 866561025.

It is not an unprimeable number, because it can be changed into a prime (520165669) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 640983 + ... + 641793.

It is an arithmetic number, because the mean of its divisors is an integer number (14255472).

Almost surely, 2^520165668 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 520165668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (684262656).

520165668 is an abundant number, since it is smaller than the sum of its proper divisors (848359644).

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

520165668 is a wasteful number, since it uses less digits than its factorization.

520165668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 985 (or 983 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 39.

The square root of 520165668 is about 22807.1407239049. The cubic root of 520165668 is about 804.2305408036.

The spelling of 520165668 in words is "five hundred twenty million, one hundred sixty-five thousand, six hundred sixty-eight".