665168075041 has 2 divisors, whose sum is σ = 665168075042. Its totient is φ = 665168075040.

The previous prime is 665168075003. The next prime is 665168075087. The reversal of 665168075041 is 140570861566.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 466523150625 + 198644924416 = 683025^2 + 445696^2 .

It is a cyclic number.

It is not a de Polignac number, because 665168075041 - 2¹⁷ = 665167943969 is a prime.

It is not a weakly prime, because it can be changed into another prime (665168078041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332584037520 + 332584037521.

It is an arithmetic number, because the mean of its divisors is an integer number (332584037521).

Almost surely, 2^665168075041 is an apocalyptic number.

It is an amenable number.

665168075041 is a deficient number, since it is larger than the sum of its proper divisors (1).

665168075041 is an equidigital number, since it uses as much as digits as its factorization.

665168075041 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1209600, while the sum is 49.

The spelling of 665168075041 in words is "six hundred sixty-five billion, one hundred sixty-eight million, seventy-five thousand, forty-one".