66118103 has 2 divisors, whose sum is σ = 66118104. Its totient is φ = 66118102.

The previous prime is 66118097. The next prime is 66118127. The reversal of 66118103 is 30181166.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66118103 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66118163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33059051 + 33059052.

It is an arithmetic number, because the mean of its divisors is an integer number (33059052).

Almost surely, 2^66118103 is an apocalyptic number.

66118103 is a deficient number, since it is larger than the sum of its proper divisors (1).

66118103 is an equidigital number, since it uses as much as digits as its factorization.

66118103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 66118103 is about 8131.3038929805. The cubic root of 66118103 is about 404.3649102256.

Adding to 66118103 its reverse (30181166), we get a palindrome (96299269).

The spelling of 66118103 in words is "sixty-six million, one hundred eighteen thousand, one hundred three".