520657066 has 8 divisors (see below), whose sum is σ = 781083684. Its totient is φ = 260295840.

The previous prime is 520657063. The next prime is 520657087. The reversal of 520657066 is 660756025.

It can be written as a sum of positive squares in 2 ways, for example, as 493772841 + 26884225 = 22221^2 + 5185^2 .

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

It is not an unprimeable number, because it can be changed into a prime (520657061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17956 + ... + 36928.

Almost surely, 2^520657066 is an apocalyptic number.

520657066 is a deficient number, since it is larger than the sum of its proper divisors (260426618).

520657066 is a wasteful number, since it uses less digits than its factorization.

520657066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32696.

The product of its (nonzero) digits is 75600, while the sum is 37.

The square root of 520657066 is about 22817.9110787995. The cubic root of 520657066 is about 804.4837120026.

The spelling of 520657066 in words is "five hundred twenty million, six hundred fifty-seven thousand, sixty-six".