No OP doesn't have many fillers. I would suggest watching to catch up but some like reading manga more.
Here's the actual list of fillers summary: 50,51, 54-60, 93,98,99,101,102, 131-143, 196-206, 213-216, 220-226, 279-283, 291-292, 303, 317-319, 326-336, 382-384, 406-7, 426-429, 453-458, 492, 497-499, 506, 542, 575-578, 590, 626-628