66263909093 has 2 divisors, whose sum is σ = 66263909094. Its totient is φ = 66263909092.

The previous prime is 66263909071. The next prime is 66263909111. The reversal of 66263909093 is 39090936266.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47148911044 + 19114998049 = 217138^2 + 138257^2 .

It is a cyclic number.

It is not a de Polignac number, because 66263909093 - 2¹² = 66263904997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66263902093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33131954546 + 33131954547.

It is an arithmetic number, because the mean of its divisors is an integer number (33131954547).

Almost surely, 2^66263909093 is an apocalyptic number.

It is an amenable number.

66263909093 is a deficient number, since it is larger than the sum of its proper divisors (1).

66263909093 is an equidigital number, since it uses as much as digits as its factorization.

66263909093 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2834352, while the sum is 53.

The spelling of 66263909093 in words is "sixty-six billion, two hundred sixty-three million, nine hundred nine thousand, ninety-three".