66643113259 has 2 divisors, whose sum is σ = 66643113260. Its totient is φ = 66643113258.

The previous prime is 66643113209. The next prime is 66643113269. The reversal of 66643113259 is 95231134666.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66643113259 is a prime.

It is not a weakly prime, because it can be changed into another prime (66643113209) 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, 33321556629 + 33321556630.

It is an arithmetic number, because the mean of its divisors is an integer number (33321556630).

Almost surely, 2^66643113259 is an apocalyptic number.

66643113259 is a deficient number, since it is larger than the sum of its proper divisors (1).

66643113259 is an equidigital number, since it uses as much as digits as its factorization.

66643113259 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 699840, while the sum is 46.

The spelling of 66643113259 in words is "sixty-six billion, six hundred forty-three million, one hundred thirteen thousand, two hundred fifty-nine".