166659061 has 2 divisors, whose sum is σ = 166659062. Its totient is φ = 166659060.

The previous prime is 166659049. The next prime is 166659071. The reversal of 166659061 is 160956661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 144144036 + 22515025 = 12006^2 + 4745^2 .

It is a cyclic number.

It is not a de Polignac number, because 166659061 - 2¹¹ = 166657013 is a prime.

It is a super-2 number, since 2×166659061² = 55550485226803442, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166659071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83329530 + 83329531.

It is an arithmetic number, because the mean of its divisors is an integer number (83329531).

Almost surely, 2^166659061 is an apocalyptic number.

It is an amenable number.

166659061 is a deficient number, since it is larger than the sum of its proper divisors (1).

166659061 is an equidigital number, since it uses as much as digits as its factorization.

166659061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 58320, while the sum is 40.

The square root of 166659061 is about 12909.6499177941. The cubic root of 166659061 is about 550.3128369024.

The spelling of 166659061 in words is "one hundred sixty-six million, six hundred fifty-nine thousand, sixty-one".