6601

Number
$6601$ (six thousand, six hundred and one) is:


 * $7 \times 23 \times 41$


 * The $18$th Poulet number after $341, 561, 645, 1105, 1387, 1729, 1905, 2047, 2465, 2701, 2821, 3277, 4033, 4369, 4371, 4681, 5461$:
 * $2^{6601} \equiv 2 \pmod {6601}$: $6601 = 7 \times 23 \times 41$