Tough spot, Sunday Million

[TreMomey]

80 players left in Sunday Million on PS. I am 3rd overall in chips and the BB is 4th overall. He has been at this table for about 5 or 6 hands and this is the first Button/SB/BB confrontation that we've had. He didn't instashove but he shoved before he had to hit his time button so it was about 15-20 seconds if that matters. Avg stack in the tournament is 870k and chip leader has like 2.2 mil

Poker Stars
No Limit Holdem Tournament
Blinds: t30000/t60000
(Ante: t3000)
9 players
Converter
Hero (Button): 1706072 in chips
SB: 350662 in chips
BB: 1581612 in chips

Hero is dealt:[Kc As]
Pre-flop: (9 players)
6 folds, Button raises to t165000, SB raises all-in t347662, BB raises all-in t1578612.