678641167 has 2 divisors, whose sum is σ = 678641168. Its totient is φ = 678641166.

The previous prime is 678641149. The next prime is 678641189. The reversal of 678641167 is 761146876.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 678641167 - 2¹¹ = 678639119 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (678641767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339320583 + 339320584.

It is an arithmetic number, because the mean of its divisors is an integer number (339320584).

Almost surely, 2^678641167 is an apocalyptic number.

678641167 is a deficient number, since it is larger than the sum of its proper divisors (1).

678641167 is an equidigital number, since it uses as much as digits as its factorization.

678641167 is an evil number, because the sum of its binary digits is even.

The product of its digits is 338688, while the sum is 46.

The square root of 678641167 is about 26050.7421583340. The cubic root of 678641167 is about 878.7798029318.

The spelling of 678641167 in words is "six hundred seventy-eight million, six hundred forty-one thousand, one hundred sixty-seven".