166653317 has 2 divisors, whose sum is σ = 166653318. Its totient is φ = 166653316.

The previous prime is 166653287. The next prime is 166653341. The reversal of 166653317 is 713356661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 162970756 + 3682561 = 12766^2 + 1919^2 .

It is a cyclic number.

It is not a de Polignac number, because 166653317 - 2⁸ = 166653061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (163653317) 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, 83326658 + 83326659.

It is an arithmetic number, because the mean of its divisors is an integer number (83326659).

Almost surely, 2^166653317 is an apocalyptic number.

It is an amenable number.

166653317 is a deficient number, since it is larger than the sum of its proper divisors (1).

166653317 is an equidigital number, since it uses as much as digits as its factorization.

166653317 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 68040, while the sum is 38.

The square root of 166653317 is about 12909.4274466376. The cubic root of 166653317 is about 550.3065145474.

The spelling of 166653317 in words is "one hundred sixty-six million, six hundred fifty-three thousand, three hundred seventeen".