66717681103 has 2 divisors, whose sum is σ = 66717681104. Its totient is φ = 66717681102.

The previous prime is 66717681083. The next prime is 66717681139. The reversal of 66717681103 is 30118671766.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66717681103 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66717681193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33358840551 + 33358840552.

It is an arithmetic number, because the mean of its divisors is an integer number (33358840552).

Almost surely, 2^66717681103 is an apocalyptic number.

66717681103 is a deficient number, since it is larger than the sum of its proper divisors (1).

66717681103 is an equidigital number, since it uses as much as digits as its factorization.

66717681103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 254016, while the sum is 46.

The spelling of 66717681103 in words is "sixty-six billion, seven hundred seventeen million, six hundred eighty-one thousand, one hundred three".