Let $S(n)$ be the sum of all contiguous integer-substrings that can be formed from the integer $n$. The substrings need not be distinct.

For example, $S(2024)=2+0+2+4+20+02+24+202+024+2024=2304$.

Let $P(n)$ be the integer formed by concatenating the first $n$ primes together. For example, $P(7)=2357111317$.

Let $C(n,k)$ be the integer formed by concatenating $k$ copies of $P(n)$ together. For example, $C(7,3)=235711131723571113172357111317$.

Evaluate $S(C({10}^6,{10}^{12}))mod({10}^9+7)$.