166683326993 has 2 divisors, whose sum is σ = 166683326994. Its totient is φ = 166683326992.

The previous prime is 166683326987. The next prime is 166683327001. The reversal of 166683326993 is 399623386661.

166683326993 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., 117986754064 + 48696572929 = 343492^2 + 220673^2 .

It is a cyclic number.

It is not a de Polignac number, because 166683326993 - 2¹⁴ = 166683310609 is a prime.

It is not a weakly prime, because it can be changed into another prime (166683326393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83341663496 + 83341663497.

It is an arithmetic number, because the mean of its divisors is an integer number (83341663497).

Almost surely, 2^166683326993 is an apocalyptic number.

It is an amenable number.

166683326993 is a deficient number, since it is larger than the sum of its proper divisors (1).

166683326993 is an equidigital number, since it uses as much as digits as its factorization.

166683326993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 45349632, while the sum is 62.

The spelling of 166683326993 in words is "one hundred sixty-six billion, six hundred eighty-three million, three hundred twenty-six thousand, nine hundred ninety-three".