Is 664 a deficient number and what is its deficiency?

Is 664 a deficient number?

Here we will explain and calculate if 664 is a deficient number and its deficiency if applicable.

664 is a deficient number if the sum of its proper divisors is less than 664.

The sum of its proper divisors is calculated as follows: 1 + 2 + 4 + 8 + 83 + 166 + 332 = 596.

596 is less than 664. Therefore, 664 is a deficient number.

The deficiency of 664 is 664 minus the sum of its proper divisors. Thus, the deficiency of 664 is 664 - 596 = 68

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