1686800674667 has 2 divisors, whose sum is σ = 1686800674668. Its totient is φ = 1686800674666.

The previous prime is 1686800674627. The next prime is 1686800674693. The reversal of 1686800674667 is 7664760086861.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1686800674667 - 2³⁴ = 1669620805483 is a prime.

It is not a weakly prime, because it can be changed into another prime (1686800674607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 843400337333 + 843400337334.

It is an arithmetic number, because the mean of its divisors is an integer number (843400337334).

Almost surely, 2^{1686800674667} is an apocalyptic number.

1686800674667 is a deficient number, since it is larger than the sum of its proper divisors (1).

1686800674667 is an equidigital number, since it uses as much as digits as its factorization.

1686800674667 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 97542144, while the sum is 65.

The spelling of 1686800674667 in words is "one trillion, six hundred eighty-six billion, eight hundred million, six hundred seventy-four thousand, six hundred sixty-seven".