520051663 has 8 divisors (see below), whose sum is σ = 534382848. Its totient is φ = 505856664.

The previous prime is 520051661. The next prime is 520051673. The reversal of 520051663 is 366150025.

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 520051663 - 2¹ = 520051661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520051661) 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 7 ways as a sum of consecutive naturals, for example, 26281 + ... + 41602.

It is an arithmetic number, because the mean of its divisors is an integer number (66797856).

Almost surely, 2^520051663 is an apocalyptic number.

520051663 is a deficient number, since it is larger than the sum of its proper divisors (14331185).

520051663 is a wasteful number, since it uses less digits than its factorization.

520051663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68093.

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 520051663 is about 22804.6412600593. The cubic root of 520051663 is about 804.1717819583.

The spelling of 520051663 in words is "five hundred twenty million, fifty-one thousand, six hundred sixty-three".