520666513 has 8 divisors (see below), whose sum is σ = 527331200. Its totient is φ = 514036368.

The previous prime is 520666511. The next prime is 520666543. The reversal of 520666513 is 315666025.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 520666513 - 2¹ = 520666511 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (520666511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22408 + ... + 39286.

It is an arithmetic number, because the mean of its divisors is an integer number (65916400).

Almost surely, 2^520666513 is an apocalyptic number.

It is an amenable number.

520666513 is a deficient number, since it is larger than the sum of its proper divisors (6664687).

520666513 is a wasteful number, since it uses less digits than its factorization.

520666513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17271.

The product of its (nonzero) digits is 32400, while the sum is 34.

The square root of 520666513 is about 22818.1180862927. The cubic root of 520666513 is about 804.4885775927.

The spelling of 520666513 in words is "five hundred twenty million, six hundred sixty-six thousand, five hundred thirteen".