665708602337 has 2 divisors, whose sum is σ = 665708602338. Its totient is φ = 665708602336.

The previous prime is 665708602331. The next prime is 665708602487. The reversal of 665708602337 is 733206807566.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 602325001216 + 63383601121 = 776096^2 + 251761^2 .

It is a cyclic number.

It is not a de Polignac number, because 665708602337 - 2³⁸ = 390830695393 is a prime.

It is not a weakly prime, because it can be changed into another prime (665708602331) 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, 332854301168 + 332854301169.

It is an arithmetic number, because the mean of its divisors is an integer number (332854301169).

Almost surely, 2^665708602337 is an apocalyptic number.

It is an amenable number.

665708602337 is a deficient number, since it is larger than the sum of its proper divisors (1).

665708602337 is an equidigital number, since it uses as much as digits as its factorization.

665708602337 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7620480, while the sum is 53.

The spelling of 665708602337 in words is "six hundred sixty-five billion, seven hundred eight million, six hundred two thousand, three hundred thirty-seven".