Yes, and you can do with less.

According to this site (https://www.crypto51.app/), it costs around $600k to carry out a 51% attack on Bitcoin for one hour. Now that's scary.

I guess the reason we don't see this happening is two-fold:

1. Carrying out the attack will hurt the price significantly, thereby hurting the reward of the hacker.
2. It's hard to get access to that kind of hashrate in any practical manner.

But I worry that we will see one in the future.