The GCF of 11 and 66 is 11. Since 11 is a factor of 66, it is automatically the GCF.
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The greatest common factor (GCF) refers to a factor that is COMMON to two or more numbers. You have only one number in the question! The greatest factor of any number is itself.
The greatest common factor of 66 , 132 = 66
The greatest common factor of 42 and 66 is 6.6
The Greatest Common Factor of 34 and 66 is 2.
The greatest common factor of 66 and 153 is 3.
The greatest common factor of 70 , 66 = 2