665727276287 has 2 divisors, whose sum is σ = 665727276288. Its totient is φ = 665727276286.

The previous prime is 665727276241. The next prime is 665727276337. The reversal of 665727276287 is 782672727566.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 665727276287 - 2⁸ = 665727276031 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (665727276587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332863638143 + 332863638144.

It is an arithmetic number, because the mean of its divisors is an integer number (332863638144).

Almost surely, 2^665727276287 is an apocalyptic number.

665727276287 is a deficient number, since it is larger than the sum of its proper divisors (1).

665727276287 is an equidigital number, since it uses as much as digits as its factorization.

665727276287 is an evil number, because the sum of its binary digits is even.

The product of its digits is 165957120, while the sum is 65.

The spelling of 665727276287 in words is "six hundred sixty-five billion, seven hundred twenty-seven million, two hundred seventy-six thousand, two hundred eighty-seven".