660530 has 16 divisors (see below), whose sum is σ = 1280664. Its totient is φ = 243840.

The previous prime is 660529. The next prime is 660547. The reversal of 660530 is 35066.

It can be written as a sum of positive squares in 4 ways, for example, as 279841 + 380689 = 529^2 + 617^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2411 + ... + 2670.

2⁶⁶⁰⁵³⁰ is an apocalyptic number.

660530 is a deficient number, since it is larger than the sum of its proper divisors (620134).

660530 is a wasteful number, since it uses less digits than its factorization.

660530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5101.

The product of its (nonzero) digits is 540, while the sum is 20.

The square root of 660530 is about 812.7299674554. The cubic root of 660530 is about 87.0891761887.

Adding to 660530 its reverse (35066), we get a palindrome (695596).

The spelling of 660530 in words is "six hundred sixty thousand, five hundred thirty".