506657 has 4 divisors (see below), whose sum is σ = 511680. Its totient is φ = 501636.

The previous prime is 506647. The next prime is 506663. The reversal of 506657 is 756605.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 506657 - 2⁶ = 506593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (506647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2357 + ... + 2562.

It is an arithmetic number, because the mean of its divisors is an integer number (127920).

2⁵⁰⁶⁶⁵⁷ is an apocalyptic number.

It is an amenable number.

506657 is a deficient number, since it is larger than the sum of its proper divisors (5023).

506657 is a wasteful number, since it uses less digits than its factorization.

506657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5022.

The product of its (nonzero) digits is 6300, while the sum is 29.

The square root of 506657 is about 711.7984265226. The cubic root of 506657 is about 79.7207450929.

The spelling of 506657 in words is "five hundred six thousand, six hundred fifty-seven".