166506041 has 8 divisors (see below), whose sum is σ = 189862344. Its totient is φ = 144656640.

The previous prime is 166506037. The next prime is 166506047. The reversal of 166506041 is 140605661.

It can be written as a sum of positive squares in 4 ways, for example, as 54760000 + 111746041 = 7400^2 + 10571^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 166506041 - 2² = 166506037 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 166505995 and 166506013.

It is not an unprimeable number, because it can be changed into a prime (166506047) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 376490 + ... + 376931.

It is an arithmetic number, because the mean of its divisors is an integer number (23732793).

Almost surely, 2^166506041 is an apocalyptic number.

It is an amenable number.

166506041 is a deficient number, since it is larger than the sum of its proper divisors (23356303).

166506041 is a wasteful number, since it uses less digits than its factorization.

166506041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 753451.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 166506041 is about 12903.7219824359. The cubic root of 166506041 is about 550.1443599023.

The spelling of 166506041 in words is "one hundred sixty-six million, five hundred six thousand, forty-one".