666666700067 has 2 divisors, whose sum is σ = 666666700068. Its totient is φ = 666666700066.

The previous prime is 666666700033. The next prime is 666666700069. The reversal of 666666700067 is 760007666666.

666666700067 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 a de Polignac number, because none of the positive numbers 2^k-666666700067 is a prime.

Together with 666666700069, 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 = 666666699985 and 666666700021.

It is not a weakly prime, because it can be changed into another prime (666666700069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333333350033 + 333333350034.

It is an arithmetic number, because the mean of its divisors is an integer number (333333350034).

Almost surely, 2^666666700067 is an apocalyptic number.

666666700067 is a deficient number, since it is larger than the sum of its proper divisors (1).

666666700067 is an equidigital number, since it uses as much as digits as its factorization.

666666700067 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13716864, while the sum is 56.

The spelling of 666666700067 in words is "six hundred sixty-six billion, six hundred sixty-six million, seven hundred thousand, sixty-seven".