667216267117 has 2 divisors, whose sum is σ = 667216267118. Its totient is φ = 667216267116.

The previous prime is 667216267111. The next prime is 667216267127. The reversal of 667216267117 is 711762612766.

It is a happy number.

667216267117 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 662174415081 + 5041852036 = 813741^2 + 71006^2 .

It is a cyclic number.

It is not a de Polignac number, because 667216267117 - 2³¹ = 665068783469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (667216267111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333608133558 + 333608133559.

It is an arithmetic number, because the mean of its divisors is an integer number (333608133559).

Almost surely, 2^667216267117 is an apocalyptic number.

It is an amenable number.

667216267117 is a deficient number, since it is larger than the sum of its proper divisors (1).

667216267117 is an equidigital number, since it uses as much as digits as its factorization.

667216267117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1778112, while the sum is 52.

The spelling of 667216267117 in words is "six hundred sixty-seven billion, two hundred sixteen million, two hundred sixty-seven thousand, one hundred seventeen".