166044041 has 2 divisors, whose sum is σ = 166044042. Its totient is φ = 166044040.

The previous prime is 166044031. The next prime is 166044089. The reversal of 166044041 is 140440661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 89113600 + 76930441 = 9440^2 + 8771^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166044041 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 166044041.

It is not a weakly prime, because it can be changed into another prime (166044031) 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, 83022020 + 83022021.

It is an arithmetic number, because the mean of its divisors is an integer number (83022021).

Almost surely, 2^166044041 is an apocalyptic number.

It is an amenable number.

166044041 is a deficient number, since it is larger than the sum of its proper divisors (1).

166044041 is an equidigital number, since it uses as much as digits as its factorization.

166044041 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 166044041 is about 12885.8077356447. The cubic root of 166044041 is about 549.6350647993.

The spelling of 166044041 in words is "one hundred sixty-six million, forty-four thousand, forty-one".