666382267 has 2 divisors, whose sum is σ = 666382268. Its totient is φ = 666382266.

The previous prime is 666382253. The next prime is 666382279. The reversal of 666382267 is 762283666.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 666382267 - 2¹⁹ = 665857979 is a prime.

It is not a weakly prime, because it can be changed into another prime (666382207) 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, 333191133 + 333191134.

It is an arithmetic number, because the mean of its divisors is an integer number (333191134).

Almost surely, 2^666382267 is an apocalyptic number.

666382267 is a deficient number, since it is larger than the sum of its proper divisors (1).

666382267 is an equidigital number, since it uses as much as digits as its factorization.

666382267 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 870912, while the sum is 46.

The square root of 666382267 is about 25814.3810113665. The cubic root of 666382267 is about 873.4562240711.

The spelling of 666382267 in words is "six hundred sixty-six million, three hundred eighty-two thousand, two hundred sixty-seven".