520660771 has 4 divisors (see below), whose sum is σ = 522303552. Its totient is φ = 519017992.

The previous prime is 520660753. The next prime is 520660793. The reversal of 520660771 is 177066025.

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

It is a cyclic number.

It is not a de Polignac number, because 520660771 - 2¹³ = 520652579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (520660471) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 820915 + ... + 821548.

It is an arithmetic number, because the mean of its divisors is an integer number (130575888).

Almost surely, 2^520660771 is an apocalyptic number.

520660771 is a deficient number, since it is larger than the sum of its proper divisors (1642781).

520660771 is a wasteful number, since it uses less digits than its factorization.

520660771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1642780.

The product of its (nonzero) digits is 17640, while the sum is 34.

The square root of 520660771 is about 22817.9922648773. The cubic root of 520660771 is about 804.4856202356.

The spelling of 520660771 in words is "five hundred twenty million, six hundred sixty thousand, seven hundred seventy-one".