666111301187 has 2 divisors, whose sum is σ = 666111301188. Its totient is φ = 666111301186.

The previous prime is 666111301181. The next prime is 666111301213. The reversal of 666111301187 is 781103111666.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 666111301187 - 2⁶ = 666111301123 is a prime.

It is not a weakly prime, because it can be changed into another prime (666111301181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333055650593 + 333055650594.

It is an arithmetic number, because the mean of its divisors is an integer number (333055650594).

Almost surely, 2^666111301187 is an apocalyptic number.

666111301187 is a deficient number, since it is larger than the sum of its proper divisors (1).

666111301187 is an equidigital number, since it uses as much as digits as its factorization.

666111301187 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 41.

The spelling of 666111301187 in words is "six hundred sixty-six billion, one hundred eleven million, three hundred one thousand, one hundred eighty-seven".