520088666 has 4 divisors (see below), whose sum is σ = 780133002. Its totient is φ = 260044332.

The previous prime is 520088651. The next prime is 520088669. The reversal of 520088666 is 666880025.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 387263041 + 132825625 = 19679^2 + 11525^2 .

It is not an unprimeable number, because it can be changed into a prime (520088669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130022165 + ... + 130022168.

Almost surely, 2^520088666 is an apocalyptic number.

520088666 is a deficient number, since it is larger than the sum of its proper divisors (260044336).

520088666 is a wasteful number, since it uses less digits than its factorization.

520088666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260044335.

The product of its (nonzero) digits is 138240, while the sum is 41.

The square root of 520088666 is about 22805.4525497741. The cubic root of 520088666 is about 804.1908544626.

The spelling of 520088666 in words is "five hundred twenty million, eighty-eight thousand, six hundred sixty-six".