167667161 has 2 divisors, whose sum is σ = 167667162. Its totient is φ = 167667160.

The previous prime is 167667133. The next prime is 167667193. The reversal of 167667161 is 161766761.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 112254025 + 55413136 = 10595^2 + 7444^2 .

It is a cyclic number.

It is not a de Polignac number, because 167667161 - 2¹⁰ = 167666137 is a prime.

It is a super-2 number, since 2×167667161² = 56224553755599842, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (167667131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83833580 + 83833581.

It is an arithmetic number, because the mean of its divisors is an integer number (83833581).

Almost surely, 2^167667161 is an apocalyptic number.

It is an amenable number.

167667161 is a deficient number, since it is larger than the sum of its proper divisors (1).

167667161 is an equidigital number, since it uses as much as digits as its factorization.

167667161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 63504, while the sum is 41.

The square root of 167667161 is about 12948.6354879578. The cubic root of 167667161 is about 551.4201985072.

The spelling of 167667161 in words is "one hundred sixty-seven million, six hundred sixty-seven thousand, one hundred sixty-one".