665727276587 has 2 divisors, whose sum is σ = 665727276588. Its totient is φ = 665727276586.

The previous prime is 665727276553. The next prime is 665727276593. The reversal of 665727276587 is 785672727566.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 665727276587 - 2⁶ = 665727276523 is a prime.

It is not a weakly prime, because it can be changed into another prime (665727276287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332863638293 + 332863638294.

It is an arithmetic number, because the mean of its divisors is an integer number (332863638294).

Almost surely, 2^665727276587 is an apocalyptic number.

665727276587 is a deficient number, since it is larger than the sum of its proper divisors (1).

665727276587 is an equidigital number, since it uses as much as digits as its factorization.

665727276587 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 414892800, while the sum is 68.

The spelling of 665727276587 in words is "six hundred sixty-five billion, seven hundred twenty-seven million, two hundred seventy-six thousand, five hundred eighty-seven".