166541017 has 2 divisors, whose sum is σ = 166541018. Its totient is φ = 166541016.

The previous prime is 166540981. The next prime is 166541093. The reversal of 166541017 is 710145661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 166384201 + 156816 = 12899^2 + 396^2 .

It is an emirp because it is prime and its reverse (710145661) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166541017 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 166541017.

It is not a weakly prime, because it can be changed into another prime (166541117) 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, 83270508 + 83270509.

It is an arithmetic number, because the mean of its divisors is an integer number (83270509).

Almost surely, 2^166541017 is an apocalyptic number.

It is an amenable number.

166541017 is a deficient number, since it is larger than the sum of its proper divisors (1).

166541017 is an equidigital number, since it uses as much as digits as its factorization.

166541017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 166541017 is about 12905.0771791570. The cubic root of 166541017 is about 550.1828780283.

Adding to 166541017 its reverse (710145661), we get a palindrome (876686678).

It can be divided in two parts, 16654 and 1017, that added together give a palindrome (17671).

The spelling of 166541017 in words is "one hundred sixty-six million, five hundred forty-one thousand, seventeen".