Legal Question in Business Law in California

It can be any number. There are, however, restrictions on the percentage of the directors who can be "interested" directors. So you need to make sure that you will have enough directors so there can be enough disinterested directors.

The authorized number of directors shall not be less than three; provided, however, in the event the corporation has only one shareholder, the number may be one, and in the event the corporation has only two shareholders, the number may be two, and the authorized number of directors of the corporation may be changed by the board or by a majority of the outstanding shares entitled to vote; provided, however, that once the number of directors is 5 or more a bylaw or amendment of the articles reducing the fixed number or the minimum number of directors to a number less than 5 cannot be adopted if the votes cast against its adoption at a meeting or the shares not consenting in the case of action by written consent are equal to more than 16-2/3 percent of the outstanding shares entitled to vote.