The Toffees have also signed Brazilian winger Bernard on a permanent deal.

Barcelona said they reserve the right to buy Mina back, while Gomes will cost Everton a £2m loan fee.

"Everton is historically the fourth most successful club in England," said Bernard.

Bernard, 25, was out of contract after leaving Ukrainian club Shakhtar Donetsk in June.

He has played 14 times for Brazil, scoring once, with his last international appearance coming at the 2014 World Cup.

Everton have yet to announce Mina and Gomes but Barcelona said on their website that they had reached agreements for both to move to Goodison Park.

Mina's arrival will mean Everton have spent more than £60m in the past two weeks following the initial £35m arrival of Brazilian winger Richarlison from Watford, a deal that could rise to £50m.