664136167 has 2 divisors, whose sum is σ = 664136168. Its totient is φ = 664136166.

The previous prime is 664136159. The next prime is 664136183. The reversal of 664136167 is 761631466.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 664136167 - 2³ = 664136159 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (664130167) 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, 332068083 + 332068084.

It is an arithmetic number, because the mean of its divisors is an integer number (332068084).

Almost surely, 2^664136167 is an apocalyptic number.

664136167 is a deficient number, since it is larger than the sum of its proper divisors (1).

664136167 is an equidigital number, since it uses as much as digits as its factorization.

664136167 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 40.

The square root of 664136167 is about 25770.8394702229. The cubic root of 664136167 is about 872.4737657648.

The spelling of 664136167 in words is "six hundred sixty-four million, one hundred thirty-six thousand, one hundred sixty-seven".