Is 665 a deficient number and what is its deficiency?

Is 665 a deficient number?

Here we will explain and calculate if 665 is a deficient number and its deficiency if applicable.

665 is a deficient number if the sum of its proper divisors is less than 665.

The sum of its proper divisors is calculated as follows: 1 + 5 + 7 + 19 + 35 + 95 + 133 = 295.

295 is less than 665. Therefore, 665 is a deficient number.

The deficiency of 665 is 665 minus the sum of its proper divisors. Thus, the deficiency of 665 is 665 - 295 = 370

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