667087111 has 2 divisors, whose sum is σ = 667087112. Its totient is φ = 667087110.

The previous prime is 667087073. The next prime is 667087177. The reversal of 667087111 is 111780766.

667087111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-667087111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (667082111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333543555 + 333543556.

It is an arithmetic number, because the mean of its divisors is an integer number (333543556).

Almost surely, 2^667087111 is an apocalyptic number.

667087111 is a deficient number, since it is larger than the sum of its proper divisors (1).

667087111 is an equidigital number, since it uses as much as digits as its factorization.

667087111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14112, while the sum is 37.

The square root of 667087111 is about 25828.0295609247. The cubic root of 667087111 is about 873.7640721214.

The spelling of 667087111 in words is "six hundred sixty-seven million, eighty-seven thousand, one hundred eleven".