Problem with exporting big illustrator file to pdf

 Hello, I have an Illustrator file that is 3 GB in size and I need to export it to PDF with a maximum file size of 60 MB. It is important to maintain the high resolution of the images within the file. Additionally, the file contains 55 artboards, each with a size of 1080x1920 pixels.

 Note: I unchecked the option (preserve illustrator editing Capabilities) also the compression (bicubic downsampling to 150 ppi-jpeg- maximum) in both color and grayscale and the pictures are all Embedded not link but the file won't be exported unless the pictures get pixels.