Today is 6 day of the year.

6 = 2 x 3.

6 is the smallest perfect number.

6 is a triangular number.

6 = 3!

6 is a semiprime.

6 is an unhappy number, i.e. the sum of the squares of the digits results in the following sequence, 36, 45, 41, 17, 50, 25, 29, 85, 89, 145, 42, 20, 4, 16, 37, 58, 89 the repeated 89 shows that the sequence will never reach 1.

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