667181440067 has 2 divisors, whose sum is σ = 667181440068. Its totient is φ = 667181440066.

The previous prime is 667181440039. The next prime is 667181440069. The reversal of 667181440067 is 760044181766.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 667181440067 - 2²⁶ = 667114331203 is a prime.

Together with 667181440069, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 667181439997 and 667181440024.

It is not a weakly prime, because it can be changed into another prime (667181440069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333590720033 + 333590720034.

It is an arithmetic number, because the mean of its divisors is an integer number (333590720034).

Almost surely, 2^667181440067 is an apocalyptic number.

667181440067 is a deficient number, since it is larger than the sum of its proper divisors (1).

667181440067 is an equidigital number, since it uses as much as digits as its factorization.

667181440067 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1354752, while the sum is 50.

The spelling of 667181440067 in words is "six hundred sixty-seven billion, one hundred eighty-one million, four hundred forty thousand, sixty-seven".