27550 is a member of OEIS A256646: 26-gonal pyramidal numbers: a(n) = n*(n+1)*(8*n-7)/2, here n=19.

27550 is a happy, Harshad, primitive abundant, Zumkeller and pseudoperfect number.

27550 marks the end of a run of four numbers that are NOT squarefree.

27550 can be rendered as a digital equation as follows:

2 * 7 * (5 - 5) = 0