660522 has 16 divisors (see below), whose sum is σ = 1329120. Its totient is φ = 218832.

The previous prime is 660521. The next prime is 660529. The reversal of 660522 is 225066.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 660522.

It is not an unprimeable number, because it can be changed into a prime (660521) by changing a digit.

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, 1504 + ... + 1892.

It is an arithmetic number, because the mean of its divisors is an integer number (83070).

2⁶⁶⁰⁵²² is an apocalyptic number.

660522 is an abundant number, since it is smaller than the sum of its proper divisors (668598).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

660522 is a wasteful number, since it uses less digits than its factorization.

660522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 677.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 660522 is about 812.7250457566. The cubic root of 660522 is about 87.0888245941.

Adding to 660522 its reverse (225066), we get a palindrome (885588).

The spelling of 660522 in words is "six hundred sixty thousand, five hundred twenty-two".