Is 660 a deficient number and what is its deficiency?

Is 660 a deficient number?

Here we will explain and calculate if 660 is a deficient number and its deficiency if applicable.

660 is a deficient number if the sum of its proper divisors is less than 660.

The sum of its proper divisors is calculated as follows: 1 + 2 + 3 + 4 + 5 + 6 + 10 + 11 + 12 + 15 + 20 + 22 + 30 + 33 + 44 + 55 + 60 + 66 + 110 + 132 + 165 + 220 + 330 = 1356.

1356 is not less than 660. Therefore, 660 is not a deficient number.

The deficiency of 660 is 660 minus the sum of its proper divisors. Thus, the deficiency of 660 is 660 - 1356 = No Deficiency

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