If you do a Hohmann transfer — the most basic sort, used by most Δv calculations — from Earth to the Sun, yes. But if you give yourself solar escape velocity (a

If you do a Hohmann transfer — the most basic sort, used by most Δv calculations — from Earth to the Sun, yes. But if you give yourself solar escape velocity (a savings of about 59% in your hyperbolic Earth escape velocity, which works out to a huge savings of about 18.9 km/s Δv if you do your burn in Low Earth Orbit), then once you get very far from the Sun you can stop yourself virtually for free, and fall straight down. The whole trip would take decades though. The same basic idea works for reaching any inner object orbiting any body. In practice you can probably do better by aiming for a planet and slingshotting, but that gets more complicated.