167066321 has 2 divisors, whose sum is σ = 167066322. Its totient is φ = 167066320.

The previous prime is 167066287. The next prime is 167066323. The reversal of 167066321 is 123660761.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 122323600 + 44742721 = 11060^2 + 6689^2 .

It is a cyclic number.

It is not a de Polignac number, because 167066321 - 2⁶ = 167066257 is a prime.

It is a super-2 number, since 2×167066321² = 55822311224950082, which contains 22 as substring.

Together with 167066323, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_9348071 and since 167066321 and 9348071 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (167066323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83533160 + 83533161.

It is an arithmetic number, because the mean of its divisors is an integer number (83533161).

Almost surely, 2^167066321 is an apocalyptic number.

It is an amenable number.

167066321 is a deficient number, since it is larger than the sum of its proper divisors (1).

167066321 is an equidigital number, since it uses as much as digits as its factorization.

167066321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 167066321 is about 12925.4137651373. The cubic root of 167066321 is about 550.7607335308.

The spelling of 167066321 in words is "one hundred sixty-seven million, sixty-six thousand, three hundred twenty-one".