665055011113 has 2 divisors, whose sum is σ = 665055011114. Its totient is φ = 665055011112.

The previous prime is 665055011069. The next prime is 665055011129. The reversal of 665055011113 is 311110550566.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 470284607529 + 194770403584 = 685773^2 + 441328^2 .

It is a cyclic number.

It is not a de Polignac number, because 665055011113 - 2³⁷ = 527616057641 is a prime.

It is not a weakly prime, because it can be changed into another prime (665055011143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332527505556 + 332527505557.

It is an arithmetic number, because the mean of its divisors is an integer number (332527505557).

Almost surely, 2^665055011113 is an apocalyptic number.

It is an amenable number.

665055011113 is a deficient number, since it is larger than the sum of its proper divisors (1).

665055011113 is an equidigital number, since it uses as much as digits as its factorization.

665055011113 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13500, while the sum is 34.

Adding to 665055011113 its reverse (311110550566), we get a palindrome (976165561679).

The spelling of 665055011113 in words is "six hundred sixty-five billion, fifty-five million, eleven thousand, one hundred thirteen".