1665753067441 has 2 divisors, whose sum is σ = 1665753067442. Its totient is φ = 1665753067440.

The previous prime is 1665753067421. The next prime is 1665753067481. The reversal of 1665753067441 is 1447603575661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1619330055841 + 46423011600 = 1272529^2 + 215460^2 .

It is a cyclic number.

It is not a de Polignac number, because 1665753067441 - 2³⁵ = 1631393329073 is a prime.

It is not a weakly prime, because it can be changed into another prime (1665753067421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 832876533720 + 832876533721.

It is an arithmetic number, because the mean of its divisors is an integer number (832876533721).

Almost surely, 2^{1665753067441} is an apocalyptic number.

It is an amenable number.

1665753067441 is a deficient number, since it is larger than the sum of its proper divisors (1).

1665753067441 is an equidigital number, since it uses as much as digits as its factorization.

1665753067441 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12700800, while the sum is 55.

The spelling of 1665753067441 in words is "one trillion, six hundred sixty-five billion, seven hundred fifty-three million, sixty-seven thousand, four hundred forty-one".