66644727703 has 2 divisors, whose sum is σ = 66644727704. Its totient is φ = 66644727702.

The previous prime is 66644727697. The next prime is 66644727739. The reversal of 66644727703 is 30772744666.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66644727703 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66644727203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33322363851 + 33322363852.

It is an arithmetic number, because the mean of its divisors is an integer number (33322363852).

Almost surely, 2^66644727703 is an apocalyptic number.

66644727703 is a deficient number, since it is larger than the sum of its proper divisors (1).

66644727703 is an equidigital number, since it uses as much as digits as its factorization.

66644727703 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7112448, while the sum is 52.

The spelling of 66644727703 in words is "sixty-six billion, six hundred forty-four million, seven hundred twenty-seven thousand, seven hundred three".