Bool function returns always true in C

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C

I am writing a function which checks if all digits of a number are equal (11,22,666 and so on). It seems like the function returns always true no matter the argument. I checked the math over and over again and went through the code many times with debugger but I cant figure out what is the problem.

What I have tried:

#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <math.h>
#include <stdbool.h>

bool hasidenticdigits(long long int number){

    int i, divisor = 10, size = 0, firstnumber, checkfirst;
    int temp = number;
    bool isidentic = true;

    if(temp>=10){
        while(temp>=10){                    //find size of array
            temp = (temp - (temp%divisor)) / 10;
            size++;
        }
        int array[size];

        for(i=0; i<=size; i++){
            if(number>=10){              //assign digits to array
                array[i] = number%divisor;
                number = (number - (number%divisor)) / 10;
            }
            else array[i] = number;
        }

        for(i=0; i<size; i++){
            checkfirst = array[0];                  //check the number
            if(array[i] != checkfirst){
                isidentic == false;
                break;
            }
        }
    }
    return isidentic;
}


int main(){
    char charprimecount[100];
    long long int number = 3, i, primecount;
    bool isprime;

    printf("how many prime numbers do you want to print?\n");
    primecount = atoi(fgets(charprimecount, 100, stdin));

        while(primecount>0){
            isprime = true;
            for(i=2; i<number; i++){
                if(number%i == 0)
                    isprime = false;
            }
            if(isprime == true){
                if(hasidenticdigits(number) == true){
                    primecount -= 1;
                    printf("%lld\t", number);
                }
            }
            number++;
        }

    return 0;
}