66284657288009 has 2 divisors, whose sum is σ = 66284657288010. Its totient is φ = 66284657288008.

The previous prime is 66284657287949. The next prime is 66284657288063. The reversal of 66284657288009 is 90088275648266.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53428380918784 + 12856276369225 = 7309472^2 + 3585565^2 .

It is a cyclic number.

It is not a de Polignac number, because 66284657288009 - 2⁸ = 66284657287753 is a prime.

It is not a weakly prime, because it can be changed into another prime (66284657288309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33142328644004 + 33142328644005.

It is an arithmetic number, because the mean of its divisors is an integer number (33142328644005).

Almost surely, 2^{66284657288009} is an apocalyptic number.

It is an amenable number.

66284657288009 is a deficient number, since it is larger than the sum of its proper divisors (1).

66284657288009 is an equidigital number, since it uses as much as digits as its factorization.

66284657288009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 557383680, while the sum is 71.

The spelling of 66284657288009 in words is "sixty-six trillion, two hundred eighty-four billion, six hundred fifty-seven million, two hundred eighty-eight thousand, nine".