Is 77 a deficient number and what is its deficiency?

Is 77 a deficient number?

Here we will explain and calculate if 77 is a deficient number and its deficiency if applicable.

77 is a deficient number if the sum of its proper divisors is less than 77.

The sum of its proper divisors is calculated as follows: 1 + 7 + 11 = 19.

19 is less than 77. Therefore, 77 is a deficient number.

The deficiency of 77 is 77 minus the sum of its proper divisors. Thus, the deficiency of 77 is 77 - 19 = 58

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