666027066073331 has 2 divisors, whose sum is σ = 666027066073332. Its totient is φ = 666027066073330.

The previous prime is 666027066073309. The next prime is 666027066073351. The reversal of 666027066073331 is 133370660720666.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 666027066073331 - 2⁶ = 666027066073267 is a prime.

It is a super-2 number, since 2×666027066073331² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (666027066073351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333013533036665 + 333013533036666.

It is an arithmetic number, because the mean of its divisors is an integer number (333013533036666).

Almost surely, 2^{666027066073331} is an apocalyptic number.

666027066073331 is a deficient number, since it is larger than the sum of its proper divisors (1).

666027066073331 is an equidigital number, since it uses as much as digits as its factorization.

666027066073331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20575296, while the sum is 56.

The spelling of 666027066073331 in words is "six hundred sixty-six trillion, twenty-seven billion, sixty-six million, seventy-three thousand, three hundred thirty-one".