Villian is decent, but not great. Haven't seen anything horrible or anything indicating that he's super solid either.

Party Poker No-Limit Hold'em, $ BB (9 handed) from (Format: FlopTurnRiver)

saw flop|saw showdown

UTG ($51.85)
UTG+1 ($98.09)
MP1 ($25.10)
MP2 ($0)
MP3 ($34.70)
Hero ($103.70)
Button ($71.70)
SB ($57.85)
BB ($53.70)

Preflop: Hero is CO with 7, 7. SB posts a blind of $0.25.
UTG calls $0.50, UTG+1 calls $0.50, 1 fold, MP3 calls $0.50, Hero calls $0.50, Button raises to $3.75, 2 folds, UTG calls $3.25, UTG+1 calls $3.25, MP3 folds, Hero calls $3.25.

Flop: ($16.25) 3, 5, 6 (5 players)
UTG checks, UTG+1 checks, Hero checks, Button checks.

Turn: ($16.25) 7 (5 players)
UTG checks, UTG+1 checks, Hero bets $10, Button folds, UTG folds, UTG+1 calls $10.

River: ($36.25) 4 (3 players)
UTG+1 bets $41.75, Hero ???

fold.

I'd bet the flop here (about $10) and probably bet the turn too. You have to dump this ugly river. No point in calling 1/2 your stack to potentially split (unlikely at best).

You don't have a set anymore. You are playing the board. Instafold.