660588 has 12 divisors (see below), whose sum is σ = 1541400. Its totient is φ = 220192.

The previous prime is 660563. The next prime is 660589. The reversal of 660588 is 885066.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (660589) by changing a digit.

660588 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27513 + ... + 27536.

It is an arithmetic number, because the mean of its divisors is an integer number (128450).

2⁶⁶⁰⁵⁸⁸ is an apocalyptic number.

It is an amenable number.

660588 is an abundant number, since it is smaller than the sum of its proper divisors (880812).

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

660588 is a wasteful number, since it uses less digits than its factorization.

660588 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55056 (or 55054 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 660588 is about 812.7656488804. The cubic root of 660588 is about 87.0917251642.

It can be divided in two parts, 66058 and 8, that added together give a palindrome (66066).

The spelling of 660588 in words is "six hundred sixty thousand, five hundred eighty-eight".