166761061 has 2 divisors, whose sum is σ = 166761062. Its totient is φ = 166761060.

The previous prime is 166761031. The next prime is 166761097. The reversal of 166761061 is 160167661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 153908836 + 12852225 = 12406^2 + 3585^2 .

It is a cyclic number.

It is not a de Polignac number, because 166761061 - 2¹³ = 166752869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166761011) 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, 83380530 + 83380531.

It is an arithmetic number, because the mean of its divisors is an integer number (83380531).

Almost surely, 2^166761061 is an apocalyptic number.

It is an amenable number.

166761061 is a deficient number, since it is larger than the sum of its proper divisors (1).

166761061 is an equidigital number, since it uses as much as digits as its factorization.

166761061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 166761061 is about 12913.5998466733. The cubic root of 166761061 is about 550.4250829483.

The spelling of 166761061 in words is "one hundred sixty-six million, seven hundred sixty-one thousand, sixty-one".