167666173 has 2 divisors, whose sum is σ = 167666174. Its totient is φ = 167666172.

The previous prime is 167666171. The next prime is 167666183. The reversal of 167666173 is 371666761.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 130370724 + 37295449 = 11418^2 + 6107^2 .

It is a cyclic number.

It is not a de Polignac number, because 167666173 - 2¹ = 167666171 is a prime.

It is a super-2 number, since 2×167666173² = 56223891136931858, which contains 22 as substring.

Together with 167666171, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (167666171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83833086 + 83833087.

It is an arithmetic number, because the mean of its divisors is an integer number (83833087).

Almost surely, 2^167666173 is an apocalyptic number.

It is an amenable number.

167666173 is a deficient number, since it is larger than the sum of its proper divisors (1).

167666173 is an equidigital number, since it uses as much as digits as its factorization.

167666173 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 190512, while the sum is 43.

The square root of 167666173 is about 12948.5973371636. The cubic root of 167666173 is about 551.4191154006.

The spelling of 167666173 in words is "one hundred sixty-seven million, six hundred sixty-six thousand, one hundred seventy-three".