66115510103 has 2 divisors, whose sum is σ = 66115510104. Its totient is φ = 66115510102.

The previous prime is 66115510063. The next prime is 66115510163. The reversal of 66115510103 is 30101551166.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66115510103 - 2⁸ = 66115509847 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66115510163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33057755051 + 33057755052.

It is an arithmetic number, because the mean of its divisors is an integer number (33057755052).

Almost surely, 2^66115510103 is an apocalyptic number.

66115510103 is a deficient number, since it is larger than the sum of its proper divisors (1).

66115510103 is an equidigital number, since it uses as much as digits as its factorization.

66115510103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2700, while the sum is 29.

The spelling of 66115510103 in words is "sixty-six billion, one hundred fifteen million, five hundred ten thousand, one hundred three".