666120650911 has 2 divisors, whose sum is σ = 666120650912. Its totient is φ = 666120650910.

The previous prime is 666120650807. The next prime is 666120650927. The reversal of 666120650911 is 119056021666.

666120650911 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 666120650911 - 2⁹ = 666120650399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (666120650941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333060325455 + 333060325456.

It is an arithmetic number, because the mean of its divisors is an integer number (333060325456).

Almost surely, 2^666120650911 is an apocalyptic number.

666120650911 is a deficient number, since it is larger than the sum of its proper divisors (1).

666120650911 is an equidigital number, since it uses as much as digits as its factorization.

666120650911 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 116640, while the sum is 43.

The spelling of 666120650911 in words is "six hundred sixty-six billion, one hundred twenty million, six hundred fifty thousand, nine hundred eleven".