1663 is a Prime Number, Prime(261)
1663 = 1 + 2 + 3 + 4 × 56 × 7 + 89
1663 = (9 + 87) × 6 + 543 × 2 + 1
1663 = 0^6 − 1^9 + 2^8 − 3^7 + 4^5 + 5^3 + 6^2 + 7^4 + 8^1 + 9^0
1663 is an irregular prime, since it divides the numerator of the Bernoulli number B270.
1663 cannot be written as a sum of 3 squares. (Integers that are not a sum of three squares)
Factors: 1, 1663
One thousand, six hundred sixty-three
Representations, Binary to Hexadecimal:
11001111111_2
2021121_3
121333_4
23123_5
11411_6
4564_7
3177_8
2247_9
1282_11
b67_12
9ac_13
86b_14
75d_15
67f_16
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