666800711 has 2 divisors, whose sum is σ = 666800712. Its totient is φ = 666800710.

The previous prime is 666800681. The next prime is 666800737. The reversal of 666800711 is 117008666.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 666800711 - 2²² = 662606407 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (666809711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333400355 + 333400356.

It is an arithmetic number, because the mean of its divisors is an integer number (333400356).

Almost surely, 2^666800711 is an apocalyptic number.

666800711 is a deficient number, since it is larger than the sum of its proper divisors (1).

666800711 is an equidigital number, since it uses as much as digits as its factorization.

666800711 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 666800711 is about 25822.4846016025. The cubic root of 666800711 is about 873.6390100681.

The spelling of 666800711 in words is "six hundred sixty-six million, eight hundred thousand, seven hundred eleven".