666000343 has 2 divisors, whose sum is σ = 666000344. Its totient is φ = 666000342.

The previous prime is 666000323. The next prime is 666000359. The reversal of 666000343 is 343000666.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 666000343 - 2¹⁷ = 665869271 is a prime.

It is a super-2 number, since 2×666000343² = 887112913752235298, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (666000323) 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, 333000171 + 333000172.

It is an arithmetic number, because the mean of its divisors is an integer number (333000172).

Almost surely, 2^666000343 is an apocalyptic number.

666000343 is a deficient number, since it is larger than the sum of its proper divisors (1).

666000343 is an equidigital number, since it uses as much as digits as its factorization.

666000343 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 28.

The square root of 666000343 is about 25806.9824466170. The cubic root of 666000343 is about 873.2893240486.

The spelling of 666000343 in words is "six hundred sixty-six million, three hundred forty-three", and thus it is an aban number.