166982617 has 2 divisors, whose sum is σ = 166982618. Its totient is φ = 166982616.

The previous prime is 166982581. The next prime is 166982633. The reversal of 166982617 is 716289661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 158155776 + 8826841 = 12576^2 + 2971^2 .

It is an emirp because it is prime and its reverse (716289661) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166982617 is a prime.

It is not a weakly prime, because it can be changed into another prime (166982677) 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, 83491308 + 83491309.

It is an arithmetic number, because the mean of its divisors is an integer number (83491309).

Almost surely, 2^166982617 is an apocalyptic number.

It is an amenable number.

166982617 is a deficient number, since it is larger than the sum of its proper divisors (1).

166982617 is an equidigital number, since it uses as much as digits as its factorization.

166982617 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 217728, while the sum is 46.

The square root of 166982617 is about 12922.1753973547. The cubic root of 166982617 is about 550.6687369761.

The spelling of 166982617 in words is "one hundred sixty-six million, nine hundred eighty-two thousand, six hundred seventeen".