The bet365 site also offers casino games, fantasy sports, and plenty more. However, since bet365 is banned in many countries due to gambling restrictions, many people around Europe, the US, and other locations will find they can't access bet365.
The quick answer is no, it is not. Roulette isn't rigged online for the same reason that the game isn't rigged in person, the casino doesn't need to rig the game to make their money!