Greatest Common Factor of 78, 66, 640

Greatest common factor or Greatest common divisor (GCD) can be calculated in two ways

• Greatest Common Factor of 78, 66, 640 by common division method
• Greatest Common Factor of 78, 66, 640 with matching the biggest common factor

Maximum 4 Number can be enter but you can reset

∴ So the GCF of the given numbers is 2 = 2

Factors of 78

List of positive integer factors of 78 that divides 78 without a remainder.

1,2,3,6,13,26,39,78

Factors of 66

List of positive integer factors of 66 that divides 66 without a remainder.

1,2,3,6,11,22,33,66

Factors of 640

List of positive integer factors of 640 that divides 640 without a remainder.

1,2,4,5,8,10,16,20,32,40,64,80,128,160,320,640

Greatest Common Factor

We found the factors 78,66,640 . The biggest common factor number is the GCF number.
So the greatest common factor 78,66,640 is 2.

Here are some samples of GCF of two or more Numbers calculations.

• GCF of 71, 59, 711
• GCF of 70, 62, 704
• GCF of 63, 13, 354
• GCF of 79, 80, 856
• GCF of 90, 11, 396

1. What is the GCF of 78, 66, 640?

Answer: GCF of 78, 66, 640 is 2.

2. How to Find the GCF of 78, 66, 640

Answer: Greatest Common Factor(GCF) of 78, 66, 640 = 2

Step 1: Divide all the numbers with common prime numbers having remainder zero.

Step 2: Then multiply all the prime factors GCF(78, 66, 640) = 2.