Is 66 a deficient number and what is its deficiency?

Is 66 a deficient number?

Here we will explain and calculate if 66 is a deficient number and its deficiency if applicable.

66 is a deficient number if the sum of its proper divisors is less than 66.

The sum of its proper divisors is calculated as follows: 1 + 2 + 3 + 6 + 11 + 22 + 33 = 78.

78 is not less than 66. Therefore, 66 is not a deficient number.

The deficiency of 66 is 66 minus the sum of its proper divisors. Thus, the deficiency of 66 is 66 - 78 = No Deficiency

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