665180081333 has 2 divisors, whose sum is σ = 665180081334. Its totient is φ = 665180081332.

The previous prime is 665180081311. The next prime is 665180081381. The reversal of 665180081333 is 333180081566.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 633555505444 + 31624575889 = 795962^2 + 177833^2 .

It is a cyclic number.

It is not a de Polignac number, because 665180081333 - 2²⁰ = 665179032757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (665180081833) 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, 332590040666 + 332590040667.

It is an arithmetic number, because the mean of its divisors is an integer number (332590040667).

Almost surely, 2^665180081333 is an apocalyptic number.

It is an amenable number.

665180081333 is a deficient number, since it is larger than the sum of its proper divisors (1).

665180081333 is an equidigital number, since it uses as much as digits as its factorization.

665180081333 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 311040, while the sum is 44.

The spelling of 665180081333 in words is "six hundred sixty-five billion, one hundred eighty million, eighty-one thousand, three hundred thirty-three".