eBay billionaire Meg Whitman, who last week sailed to victory in the GOP primary for governor, has written her campaign another big check, this one for $20 million.

The contribution, reported Monday on the California secretary of state’s website, brings her total self-contributions to $91 million, $17 million short of the record amount a wealthy candidate has put into his or her own campaign.

That record was set last year by New York Mayor Michael Bloomberg, a multibillionaire businessman, in his successful re-election bid.

Bloomberg spent about $185 per vote.

In last week’s win over state Insurance Commissioner Steve Poizner, Whitman spent about $56 per vote out of her own pocket.

Whitman, who will face state Attorney General Jerry Brown in November, has vowed to write checks for up to $150 million in her quest to become governor. That means she’ll likely surpass Bloomberg’s record sometime during the summer.

Contact Ken McLaughlin at 408-920-5552.