All people and prophets are like Jesus and Muhammad, peace be upon them
Children of God in a figurative sense, not in a biological sense, because they depend on God for all their lives
Adam is the first son of God in the figurative sense

Adam and Eve were the first humans, according to the Jewish, Islamic, and Christian religions, and all humans have descended from them. As stated in the Bible, Adam and Eve were created by God to take care of His creation, to populate the earth, and to have a relationship with Him

According to the Bible (Genesis 2:7), this is how humanity began: "The Lord God formed man of the dust of the ground, and breathed into his nostrils the breath of life; and man became a living soul." God then called the man Adam, and later created Eve from Adam's rib

Islam teaches that Adam and Eve disobeyed God, repented, asked for forgiveness and God forgave them. They had to suffer the consequences of their actions by living a mortal life on earth, but their relationship with God was never changed.

Adam in The Bible & The Quran | Dr. Shabir Ally - YouTube
https://www.youtube.com/watch?v=HMGdt9ajXxc

And in any case, the list of candidates for “son of God” begins with Adam, as per Luke 3:38: “...Adam, which was the son of God.”

Those who rebut by quoting Matthew 3:17 (“And suddenly a voice came from heaven, saying, ‘This is My beloved son, in whom I am well pleased’”) have overlooked the point that the Bible describes many people, Israel and Adam included, as “sons of God.” Both II Samuel 7:13-14 and I Chronicles 22:10 read, “He (Solomon) shall build a house for My name, and I will establish the throne of his kingdom forever. I will be his Father, and he shall be My son.”

Entire nations are referred to as sons, or children of God. Examples include:

Genesis 6:2, “That the sons of God saw the daughters of men…”

Genesis 6:4, “There were giants on the earth in those days, and also afterward, when the sons of God came in to the daughters of men…”

Deuteronomy 14:1, “Ye are the children of the Lord your God.”

Job 1:6, “Now there was a day when the sons of God came to present themselves before the LORD…”

Job 2:1, “Again there was a day when the sons of God came to present themselves before the LORD…”

Job 38:7, “When the morning stars sang together, and all the sons of God shouted for joy?”

Philippians 2:15, “that you may become blameless and harmless, children of God without fault in the midst of a crooked and perverse generation…”

1 John 3:1-2, “Behold what manner of love the Father has bestowed on us, that we should be called children of God! … Beloved, now we are children of God…”

In Matthew 5:9 Jesus says, “Blessed are the peacemakers, for they shall be called sons of God.” Later in Matthew 5:45, Jesus prescribed to his followers the attainment of noble attributes, “that you may be sons of your Father in heaven.” Not exclusively his Father, but their Father

http://www.youtube.com/watch?v=sREemKFBJX8

http://www.youtube.com/watch?v=355bp07ZZvE