520525668 has 96 divisors (see below), whose sum is σ = 1355316480. Its totient is φ = 154460160.

The previous prime is 520525661. The next prime is 520525679. The reversal of 520525668 is 866525025.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (520525661) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 619993 + ... + 620831.

It is an arithmetic number, because the mean of its divisors is an integer number (14117880).

Almost surely, 2^520525668 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 520525668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (677658240).

520525668 is an abundant number, since it is smaller than the sum of its proper divisors (834790812).

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

520525668 is a wasteful number, since it uses less digits than its factorization.

520525668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 997 (or 995 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 39.

The square root of 520525668 is about 22815.0316239097. The cubic root of 520525668 is about 804.4160305725.

The spelling of 520525668 in words is "five hundred twenty million, five hundred twenty-five thousand, six hundred sixty-eight".