6644111693 has 2 divisors, whose sum is σ = 6644111694. Its totient is φ = 6644111692.

The previous prime is 6644111629. The next prime is 6644111701. The reversal of 6644111693 is 3961114466.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6606926089 + 37185604 = 81283^2 + 6098^2 .

It is a cyclic number.

It is not a de Polignac number, because 6644111693 - 2⁶ = 6644111629 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6644111693.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6644111603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3322055846 + 3322055847.

It is an arithmetic number, because the mean of its divisors is an integer number (3322055847).

Almost surely, 2^6644111693 is an apocalyptic number.

It is an amenable number.

6644111693 is a deficient number, since it is larger than the sum of its proper divisors (1).

6644111693 is an equidigital number, since it uses as much as digits as its factorization.

6644111693 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 93312, while the sum is 41.

The square root of 6644111693 is about 81511.4206292591. The cubic root of 6644111693 is about 1879.9471553163.

The spelling of 6644111693 in words is "six billion, six hundred forty-four million, one hundred eleven thousand, six hundred ninety-three".