665133250505993 has 2 divisors, whose sum is σ = 665133250505994. Its totient is φ = 665133250505992.

The previous prime is 665133250505981. The next prime is 665133250506031. The reversal of 665133250505993 is 399505052331566.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 561598616517184 + 103534633988809 = 23698072^2 + 10175197^2 .

It is a cyclic number.

It is not a de Polignac number, because 665133250505993 - 2⁶ = 665133250505929 is a prime.

It is not a weakly prime, because it can be changed into another prime (665133250535993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332566625252996 + 332566625252997.

It is an arithmetic number, because the mean of its divisors is an integer number (332566625252997).

Almost surely, 2^{665133250505993} is an apocalyptic number.

It is an amenable number.

665133250505993 is a deficient number, since it is larger than the sum of its proper divisors (1).

665133250505993 is an equidigital number, since it uses as much as digits as its factorization.

665133250505993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 98415000, while the sum is 62.

The spelling of 665133250505993 in words is "six hundred sixty-five trillion, one hundred thirty-three billion, two hundred fifty million, five hundred five thousand, nine hundred ninety-three".