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The Devil's Number

Number Theory Level 3

How many positive integers \(N \) are there, such that the number 666 when divided by \(N\), leaves a remainder of 66?

7 66 6 24

Excel in math and science

Master concepts by solving fun, challenging problems.

It's hard to learn from lectures and videos

Learn more effectively through short, conceptual quizzes.

Our wiki is made for math and science

Master advanced concepts through explanations,
examples, and problems from the community.

Used and loved by 4 million people

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including olympiad champions, researchers, and professionals.

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