666337471187 has 2 divisors, whose sum is σ = 666337471188. Its totient is φ = 666337471186.

The previous prime is 666337471169. The next prime is 666337471243. The reversal of 666337471187 is 781174733666.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 666337471187 - 2¹⁴ = 666337454803 is a prime.

It is not a weakly prime, because it can be changed into another prime (666337471087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333168735593 + 333168735594.

It is an arithmetic number, because the mean of its divisors is an integer number (333168735594).

Almost surely, 2^666337471187 is an apocalyptic number.

666337471187 is a deficient number, since it is larger than the sum of its proper divisors (1).

666337471187 is an equidigital number, since it uses as much as digits as its factorization.

666337471187 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21337344, while the sum is 59.

The spelling of 666337471187 in words is "six hundred sixty-six billion, three hundred thirty-seven million, four hundred seventy-one thousand, one hundred eighty-seven".