I have those, but no flower yet. It's peanut cactus or Echinopsis chamaecereus. Enjoy its beauty.

A larger picture would help clarify, but my first guess is Echinocactus grusonii (AKA Golden Barrel), the second and less likely guess is a Ferocactus.

I think people should be wary of attaching an epithet to a plant from an unknown source. All plants exhibit differences in form, flower colo(u)r, spination, etc. Sometimes the differences are subtle, sometimes marked. Trying to nail it down makes you crazy and leads to photos being posted with a definitive ID when in fact is is an ID arrived at by photos from the internet, discussion with friends, or attempts by people like me who have the best of intentions but are only human. At any rate, enjoy the plant. All I can say is that if you are successful at getting bloom next year, you will likely be hooked. Rebutias have a gem-like quality with their bright flowers in a range of colors, colours, couleurs. The pattern for me is to have a couple of blooms, then the main flush, then a smaller flowering about a few weeks later. I think the photo above is the second flush. I'll look for a pic with the main bloom. Be careful with slugs. They will cross an ocean of deterrents to eat the plant, making holes in them, eating huge chunks from the poor little plants. Slugs here prefer Rebutias to all other cactus species I have.

1. some Echinopsis, maybe hybrid one, probably beautiful flowers 2. Cereus peruvianus f. monstrosa, "rock cactus", not hardy. Exotic unusual shape, flowers when old enough.