66748484753 has 2 divisors, whose sum is σ = 66748484754. Its totient is φ = 66748484752.

The previous prime is 66748484741. The next prime is 66748484813. The reversal of 66748484753 is 35748484766.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45656150929 + 21092333824 = 213673^2 + 145232^2 .

It is a cyclic number.

It is not a de Polignac number, because 66748484753 - 2²⁶ = 66681375889 is a prime.

It is not a weakly prime, because it can be changed into another prime (66748484053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33374242376 + 33374242377.

It is an arithmetic number, because the mean of its divisors is an integer number (33374242377).

Almost surely, 2^66748484753 is an apocalyptic number.

It is an amenable number.

66748484753 is a deficient number, since it is larger than the sum of its proper divisors (1).

66748484753 is an equidigital number, since it uses as much as digits as its factorization.

66748484753 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108380160, while the sum is 62.

The spelling of 66748484753 in words is "sixty-six billion, seven hundred forty-eight million, four hundred eighty-four thousand, seven hundred fifty-three".