66337254209 has 2 divisors, whose sum is σ = 66337254210. Its totient is φ = 66337254208.

The previous prime is 66337254173. The next prime is 66337254229. The reversal of 66337254209 is 90245273366.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54505906225 + 11831347984 = 233465^2 + 108772^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66337254209 is a prime.

It is not a weakly prime, because it can be changed into another prime (66337254229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33168627104 + 33168627105.

It is an arithmetic number, because the mean of its divisors is an integer number (33168627105).

Almost surely, 2^66337254209 is an apocalyptic number.

It is an amenable number.

66337254209 is a deficient number, since it is larger than the sum of its proper divisors (1).

66337254209 is an equidigital number, since it uses as much as digits as its factorization.

66337254209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1632960, while the sum is 47.

The spelling of 66337254209 in words is "sixty-six billion, three hundred thirty-seven million, two hundred fifty-four thousand, two hundred nine".