660264 has 64 divisors (see below), whose sum is σ = 1874880. Its totient is φ = 192000.

The previous prime is 660251. The next prime is 660271. The reversal of 660264 is 462066.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

660264 is an untouchable number, because it is not equal to the sum of proper divisors of any 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 15 ways as a sum of consecutive naturals, for example, 10794 + ... + 10854.

It is an arithmetic number, because the mean of its divisors is an integer number (29295).

2⁶⁶⁰²⁶⁴ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 660264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (937440).

660264 is an abundant number, since it is smaller than the sum of its proper divisors (1214616).

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

660264 is a wasteful number, since it uses less digits than its factorization.

660264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122 (or 118 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 660264 is about 812.5663049869. The cubic root of 660264 is about 87.0774841478.

It can be divided in two parts, 6602 and 64, that added together give a palindrome (6666).

The spelling of 660264 in words is "six hundred sixty thousand, two hundred sixty-four".