166005061 has 2 divisors, whose sum is σ = 166005062. Its totient is φ = 166005060.

The previous prime is 166005041. The next prime is 166005067. The reversal of 166005061 is 160500661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 101909025 + 64096036 = 10095^2 + 8006^2 .

It is an emirp because it is prime and its reverse (160500661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 166005061 - 2⁷ = 166004933 is a prime.

It is a super-2 number, since 2×166005061² = 55115360555227442, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166005067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83002530 + 83002531.

It is an arithmetic number, because the mean of its divisors is an integer number (83002531).

Almost surely, 2^166005061 is an apocalyptic number.

It is an amenable number.

166005061 is a deficient number, since it is larger than the sum of its proper divisors (1).

166005061 is an equidigital number, since it uses as much as digits as its factorization.

166005061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 166005061 is about 12884.2951301187. The cubic root of 166005061 is about 549.5920512080.

The spelling of 166005061 in words is "one hundred sixty-six million, five thousand, sixty-one".