Even some natural numbers have bad reputations: 666 is the mark of the Beast, 13 and 4 are unlucky, 1 is the loneliest number, 3's a crowd, and 40 (four tens)

Even some natural numbers have bad reputations: 666 is the mark of the Beast, 13 and 4 are unlucky, 1 is the loneliest number, 3's a crowd, and 40 (four tens) are terrible.