66644844743 has 2 divisors, whose sum is σ = 66644844744. Its totient is φ = 66644844742.

The previous prime is 66644844569. The next prime is 66644844769. The reversal of 66644844743 is 34744844666.

It is a happy number.

66644844743 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66644844743 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66644844443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33322422371 + 33322422372.

It is an arithmetic number, because the mean of its divisors is an integer number (33322422372).

Almost surely, 2^66644844743 is an apocalyptic number.

66644844743 is a deficient number, since it is larger than the sum of its proper divisors (1).

66644844743 is an equidigital number, since it uses as much as digits as its factorization.

66644844743 is an evil number, because the sum of its binary digits is even.

The product of its digits is 37158912, while the sum is 56.

The spelling of 66644844743 in words is "sixty-six billion, six hundred forty-four million, eight hundred forty-four thousand, seven hundred forty-three".