520666009518 has 8 divisors (see below), whose sum is σ = 1041332019048. Its totient is φ = 173555336504.

The previous prime is 520666009481. The next prime is 520666009519. The reversal of 520666009518 is 815900666025.

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

520666009518 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520666009519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43388834121 + ... + 43388834132.

It is an arithmetic number, because the mean of its divisors is an integer number (130166502381).

Almost surely, 2^520666009518 is an apocalyptic number.

520666009518 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

520666009518 is a wasteful number, since it uses less digits than its factorization.

520666009518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86777668258.

The product of its (nonzero) digits is 777600, while the sum is 48.

The spelling of 520666009518 in words is "five hundred twenty billion, six hundred sixty-six million, nine thousand, five hundred eighteen".