520075664 has 20 divisors (see below), whose sum is σ = 1017626460. Its totient is φ = 257462400.

The previous prime is 520075631. The next prime is 520075667. The reversal of 520075664 is 466570025.

It can be written as a sum of positive squares in 2 ways, for example, as 409657600 + 110418064 = 20240^2 + 10508^2 .

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (520075667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 159299 + ... + 162530.

It is an arithmetic number, because the mean of its divisors is an integer number (50881323).

Almost surely, 2^520075664 is an apocalyptic number.

It is an amenable number.

520075664 is a deficient number, since it is larger than the sum of its proper divisors (497550796).

520075664 is a wasteful number, since it uses less digits than its factorization.

520075664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321938 (or 321932 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 35.

The square root of 520075664 is about 22805.1674845856. The cubic root of 520075664 is about 804.1841529280.

The spelling of 520075664 in words is "five hundred twenty million, seventy-five thousand, six hundred sixty-four".