166882493 has 2 divisors, whose sum is σ = 166882494. Its totient is φ = 166882492.

The previous prime is 166882487. The next prime is 166882537. The reversal of 166882493 is 394288661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 136002244 + 30880249 = 11662^2 + 5557^2 .

It is a cyclic number.

It is not a de Polignac number, because 166882493 - 2¹⁴ = 166866109 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166882403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83441246 + 83441247.

It is an arithmetic number, because the mean of its divisors is an integer number (83441247).

Almost surely, 2^166882493 is an apocalyptic number.

It is an amenable number.

166882493 is a deficient number, since it is larger than the sum of its proper divisors (1).

166882493 is an equidigital number, since it uses as much as digits as its factorization.

166882493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 497664, while the sum is 47.

The square root of 166882493 is about 12918.3007009436. The cubic root of 166882493 is about 550.5586533018.

The spelling of 166882493 in words is "one hundred sixty-six million, eight hundred eighty-two thousand, four hundred ninety-three".