520667 has 4 divisors (see below), whose sum is σ = 595056. Its totient is φ = 446280.

The previous prime is 520649. The next prime is 520679. The reversal of 520667 is 766025.

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 520667 - 2⁸ = 520411 is a prime.

It is not an unprimeable number, because it can be changed into a prime (520607) 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, 37184 + ... + 37197.

It is an arithmetic number, because the mean of its divisors is an integer number (148764).

2⁵²⁰⁶⁶⁷ is an apocalyptic number.

520667 is a deficient number, since it is larger than the sum of its proper divisors (74389).

520667 is an equidigital number, since it uses as much as digits as its factorization.

520667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74388.

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 520667 is about 721.5725881711. The cubic root of 520667 is about 80.4488828416.

The spelling of 520667 in words is "five hundred twenty thousand, six hundred sixty-seven".