166871041 has 2 divisors, whose sum is σ = 166871042. Its totient is φ = 166871040.

The previous prime is 166871039. The next prime is 166871063. The reversal of 166871041 is 140178661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 166410000 + 461041 = 12900^2 + 679^2 .

It is a cyclic number.

It is not a de Polignac number, because 166871041 - 2¹ = 166871039 is a prime.

Together with 166871039, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 166870988 and 166871006.

It is not a weakly prime, because it can be changed into another prime (166871011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83435520 + 83435521.

It is an arithmetic number, because the mean of its divisors is an integer number (83435521).

It is a Proth number, since it is equal to 10185 ⋅ 2¹⁴ + 1 and 10185 < 2¹⁴.

Almost surely, 2^166871041 is an apocalyptic number.

It is an amenable number.

166871041 is a deficient number, since it is larger than the sum of its proper divisors (1).

166871041 is an equidigital number, since it uses as much as digits as its factorization.

166871041 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 166871041 is about 12917.8574461867. The cubic root of 166871041 is about 550.5460593266.

The spelling of 166871041 in words is "one hundred sixty-six million, eight hundred seventy-one thousand, forty-one".