166803617 has 2 divisors, whose sum is σ = 166803618. Its totient is φ = 166803616.

The previous prime is 166803601. The next prime is 166803631. The reversal of 166803617 is 716308661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 163737616 + 3066001 = 12796^2 + 1751^2 .

It is a cyclic number.

It is not a de Polignac number, because 166803617 - 2⁴ = 166803601 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (166803817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83401808 + 83401809.

It is an arithmetic number, because the mean of its divisors is an integer number (83401809).

Almost surely, 2^166803617 is an apocalyptic number.

It is an amenable number.

166803617 is a deficient number, since it is larger than the sum of its proper divisors (1).

166803617 is an equidigital number, since it uses as much as digits as its factorization.

166803617 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 166803617 is about 12915.2474618181. The cubic root of 166803617 is about 550.4719002278.

The spelling of 166803617 in words is "one hundred sixty-six million, eight hundred three thousand, six hundred seventeen".