666767011 has 2 divisors, whose sum is σ = 666767012. Its totient is φ = 666767010.

The previous prime is 666766999. The next prime is 666767021. The reversal of 666767011 is 110767666.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 666767011 - 2⁷ = 666766883 is a prime.

It is not a weakly prime, because it can be changed into another prime (666767021) 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, 333383505 + 333383506.

It is an arithmetic number, because the mean of its divisors is an integer number (333383506).

Almost surely, 2^666767011 is an apocalyptic number.

666767011 is a deficient number, since it is larger than the sum of its proper divisors (1).

666767011 is an equidigital number, since it uses as much as digits as its factorization.

666767011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 63504, while the sum is 40.

The square root of 666767011 is about 25821.8320612616. The cubic root of 666767011 is about 873.6242919621.

The spelling of 666767011 in words is "six hundred sixty-six million, seven hundred sixty-seven thousand, eleven".