Is 657 a deficient number and what is its deficiency?

Is 657 a deficient number?

Here we will explain and calculate if 657 is a deficient number and its deficiency if applicable.

657 is a deficient number if the sum of its proper divisors is less than 657.

The sum of its proper divisors is calculated as follows: 1 + 3 + 9 + 73 + 219 = 305.

305 is less than 657. Therefore, 657 is a deficient number.

The deficiency of 657 is 657 minus the sum of its proper divisors. Thus, the deficiency of 657 is 657 - 305 = 352

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