As an even number greater than 2, 660 is divisible by 2 and therefore composite.
660 is.
Itself and any of its factors
8 of the numbers less than 660 are divisible by 5 and 11 but not 3. All numbers divisible by 5 and 11 are multiples of their lcm; lcm(5, 11) = 55 All numbers divisibile by 5, 11 and 3 are multiples of their lcm; lcm(5, 11, 3) = 165 659 ÷ 55 = 11 54/55 → 11 numbers less than 660 are divisible by 5 and 11 659 ÷ 165 = 3 164/165 → 3 numbers less than 660 are divisible by 5, 11 and 3 → of the 11 numbers less than 660 divisible by 5 and 11, 3 are also divisible by 3 → 11 - 3 = 8 numbers less than 660 are divisible by 5 and 11 but not 3,.
yes
660
330
It is: 660/2 = 330
Any of its multiples such as 220, 440, 660, 880 .... etc
660
660
The factor tree for 660 would show that 660 can be broken down into 2 * 2 * 3 * 5 * 11. Each of these numbers is a prime factor of 660.