520666868 has 12 divisors (see below), whose sum is σ = 911473920. Its totient is φ = 260245752.

The previous prime is 520666813. The next prime is 520666889. The reversal of 520666868 is 868666025.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7508 + ... + 33131.

It is an arithmetic number, because the mean of its divisors is an integer number (75956160).

Almost surely, 2^520666868 is an apocalyptic number.

It is an amenable number.

520666868 is a deficient number, since it is larger than the sum of its proper divisors (390807052).

520666868 is a wasteful number, since it uses less digits than its factorization.

520666868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43846 (or 43844 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 47.

The square root of 520666868 is about 22818.1258651976. The cubic root of 520666868 is about 804.4887604310.

The spelling of 520666868 in words is "five hundred twenty million, six hundred sixty-six thousand, eight hundred sixty-eight".