is one piece episode 66 filler?

Igaram, Head of Security of Alabasta, continued to launch his assault on Mr. 5 and Miss Valentine, who have discovered both his identity and that of Miss Wednesday: Nefertari Vivi, Royal Princess of Alabasta. Zoro observed the attack from the rooftop, musing about Luffy being trapped in the crossfire and having to go rescue him.

As Igaram continued his attack, he yells for Vivi to escape, but she can only watch in terror. Amidst the smoke and gunfire, Mr. 5 launched a projectile at Igaram, who is promptly consumed in a powerful explosion as both Vivi and Mr. 9 watch in shock.