665603450341 has 2 divisors, whose sum is σ = 665603450342. Its totient is φ = 665603450340.

The previous prime is 665603450297. The next prime is 665603450423. The reversal of 665603450341 is 143054306566.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 633974250625 + 31629199716 = 796225^2 + 177846^2 .

It is a cyclic number.

It is not a de Polignac number, because 665603450341 - 2³⁷ = 528164496869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (665603451341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332801725170 + 332801725171.

It is an arithmetic number, because the mean of its divisors is an integer number (332801725171).

Almost surely, 2^665603450341 is an apocalyptic number.

It is an amenable number.

665603450341 is a deficient number, since it is larger than the sum of its proper divisors (1).

665603450341 is an equidigital number, since it uses as much as digits as its factorization.

665603450341 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 777600, while the sum is 43.

The spelling of 665603450341 in words is "six hundred sixty-five billion, six hundred three million, four hundred fifty thousand, three hundred forty-one".