520566407 has 4 divisors (see below), whose sum is σ = 531642336. Its totient is φ = 509490480.

The previous prime is 520566373. The next prime is 520566419. The reversal of 520566407 is 704665025.

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 520566407 - 2¹² = 520562311 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520566437) 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, 5537894 + ... + 5537987.

It is an arithmetic number, because the mean of its divisors is an integer number (132910584).

Almost surely, 2^520566407 is an apocalyptic number.

520566407 is a deficient number, since it is larger than the sum of its proper divisors (11075929).

520566407 is a wasteful number, since it uses less digits than its factorization.

520566407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11075928.

The product of its (nonzero) digits is 50400, while the sum is 35.

The square root of 520566407 is about 22815.9244169505. The cubic root of 520566407 is about 804.4370159287.

The spelling of 520566407 in words is "five hundred twenty million, five hundred sixty-six thousand, four hundred seven".