665064079187 has 2 divisors, whose sum is σ = 665064079188. Its totient is φ = 665064079186.

The previous prime is 665064079181. The next prime is 665064079201. The reversal of 665064079187 is 781970460566.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 665064079187 - 2⁴ = 665064079171 is a prime.

It is not a weakly prime, because it can be changed into another prime (665064079181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332532039593 + 332532039594.

It is an arithmetic number, because the mean of its divisors is an integer number (332532039594).

Almost surely, 2^665064079187 is an apocalyptic number.

665064079187 is a deficient number, since it is larger than the sum of its proper divisors (1).

665064079187 is an equidigital number, since it uses as much as digits as its factorization.

665064079187 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15240960, while the sum is 59.

The spelling of 665064079187 in words is "six hundred sixty-five billion, sixty-four million, seventy-nine thousand, one hundred eighty-seven".