520666530 has 16 divisors (see below), whose sum is σ = 1249599744. Its totient is φ = 138844400.

The previous prime is 520666511. The next prime is 520666543. The reversal of 520666530 is 35666025.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 520666491 and 520666500.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8677746 + ... + 8677805.

It is an arithmetic number, because the mean of its divisors is an integer number (78099984).

Almost surely, 2^520666530 is an apocalyptic number.

520666530 is an abundant number, since it is smaller than the sum of its proper divisors (728933214).

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

520666530 is a wasteful number, since it uses less digits than its factorization.

520666530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17355561.

The product of its (nonzero) digits is 32400, while the sum is 33.

The square root of 520666530 is about 22818.1184588037. The cubic root of 520666530 is about 804.4885863484.

The spelling of 520666530 in words is "five hundred twenty million, six hundred sixty-six thousand, five hundred thirty".