666367211 has 2 divisors, whose sum is σ = 666367212. Its totient is φ = 666367210.

The previous prime is 666367171. The next prime is 666367213. The reversal of 666367211 is 112763666.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 666367211 - 2¹⁴ = 666350827 is a prime.

Together with 666367213, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_34599701 and since 666367211 and 34599701 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (666367213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333183605 + 333183606.

It is an arithmetic number, because the mean of its divisors is an integer number (333183606).

Almost surely, 2^666367211 is an apocalyptic number.

666367211 is a deficient number, since it is larger than the sum of its proper divisors (1).

666367211 is an equidigital number, since it uses as much as digits as its factorization.

666367211 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432, while the sum is 38.

The square root of 666367211 is about 25814.0893893238. The cubic root of 666367211 is about 873.4496458369.

The spelling of 666367211 in words is "six hundred sixty-six million, three hundred sixty-seven thousand, two hundred eleven".