166343161 has 2 divisors, whose sum is σ = 166343162. Its totient is φ = 166343160.

The previous prime is 166343137. The next prime is 166343171. The reversal of 166343161 is 161343661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 164326761 + 2016400 = 12819^2 + 1420^2 .

It is a cyclic number.

It is not a de Polignac number, because 166343161 - 2¹⁷ = 166212089 is a prime.

It is a super-2 number, since 2×166343161² = 55340094422943842, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (166343171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83171580 + 83171581.

It is an arithmetic number, because the mean of its divisors is an integer number (83171581).

Almost surely, 2^166343161 is an apocalyptic number.

It is an amenable number.

166343161 is a deficient number, since it is larger than the sum of its proper divisors (1).

166343161 is an equidigital number, since it uses as much as digits as its factorization.

166343161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7776, while the sum is 31.

The square root of 166343161 is about 12897.4090808968. The cubic root of 166343161 is about 549.9649134642.

The spelling of 166343161 in words is "one hundred sixty-six million, three hundred forty-three thousand, one hundred sixty-one".