To find the highest common factor (HCF) of 66, 121, and 132, we first need to find the prime factors of each number. The prime factors of 66 are 2 x 3 x 11, the prime factors of 121 are 11 x 11, and the prime factors of 132 are 2 x 2 x 3 x 11. To find the HCF, we identify the common prime factors among the numbers, which are 11 in this case. Therefore, the HCF of 66, 121, and 132 is 11.
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The GCF is 11.