666968000869673 has 2 divisors, whose sum is σ = 666968000869674. Its totient is φ = 666968000869672.

The previous prime is 666968000869633. The next prime is 666968000869733. The reversal of 666968000869673 is 376968000869666.

666968000869673 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., 662614113829264 + 4353887040409 = 25741292^2 + 2086597^2 .

It is a cyclic number.

It is not a de Polignac number, because 666968000869673 - 2³⁰ = 666966927127849 is a prime.

It is a super-2 number, since 2×666968000869673² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (666968000869633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333484000434836 + 333484000434837.

It is an arithmetic number, because the mean of its divisors is an integer number (333484000434837).

Almost surely, 2^{666968000869673} is an apocalyptic number.

It is an amenable number.

666968000869673 is a deficient number, since it is larger than the sum of its proper divisors (1).

666968000869673 is an equidigital number, since it uses as much as digits as its factorization.

666968000869673 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5079158784, while the sum is 80.

The spelling of 666968000869673 in words is "six hundred sixty-six trillion, nine hundred sixty-eight billion, eight hundred sixty-nine thousand, six hundred seventy-three".