166601741 has 2 divisors, whose sum is σ = 166601742. Its totient is φ = 166601740.

The previous prime is 166601711. The next prime is 166601803. The reversal of 166601741 is 147106661.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 162460516 + 4141225 = 12746^2 + 2035^2 .

It is a cyclic number.

It is not a de Polignac number, because 166601741 - 2¹⁴ = 166585357 is a prime.

It is a super-2 number, since 2×166601741² = 55512280208462162, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 166601698 and 166601707.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166601711) 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, 83300870 + 83300871.

It is an arithmetic number, because the mean of its divisors is an integer number (83300871).

Almost surely, 2^166601741 is an apocalyptic number.

It is an amenable number.

166601741 is a deficient number, since it is larger than the sum of its proper divisors (1).

166601741 is an equidigital number, since it uses as much as digits as its factorization.

166601741 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 166601741 is about 12907.4296821637. The cubic root of 166601741 is about 550.2497389253.

The spelling of 166601741 in words is "one hundred sixty-six million, six hundred one thousand, seven hundred forty-one".