256166167 has 2 divisors, whose sum is σ = 256166168. Its totient is φ = 256166166.

The previous prime is 256166159. The next prime is 256166171. The reversal of 256166167 is 761661652.

256166167 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 256166167 - 2³ = 256166159 is a prime.

It is a super-2 number, since 2×256166167² = 131242210230943778, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256166767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128083083 + 128083084.

It is an arithmetic number, because the mean of its divisors is an integer number (128083084).

Almost surely, 2^256166167 is an apocalyptic number.

256166167 is a deficient number, since it is larger than the sum of its proper divisors (1).

256166167 is an equidigital number, since it uses as much as digits as its factorization.

256166167 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90720, while the sum is 40.

The square root of 256166167 is about 16005.1918763881. The cubic root of 256166167 is about 635.0977731937.

The spelling of 256166167 in words is "two hundred fifty-six million, one hundred sixty-six thousand, one hundred sixty-seven".