66544333259 has 2 divisors, whose sum is σ = 66544333260. Its totient is φ = 66544333258.

The previous prime is 66544333223. The next prime is 66544333267. The reversal of 66544333259 is 95233344566.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66544333259 is a prime.

It is a super-2 number, since 2×66544333259² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (66544533259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33272166629 + 33272166630.

It is an arithmetic number, because the mean of its divisors is an integer number (33272166630).

Almost surely, 2^66544333259 is an apocalyptic number.

66544333259 is a deficient number, since it is larger than the sum of its proper divisors (1).

66544333259 is an equidigital number, since it uses as much as digits as its factorization.

66544333259 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6998400, while the sum is 50.

The spelling of 66544333259 in words is "sixty-six billion, five hundred forty-four million, three hundred thirty-three thousand, two hundred fifty-nine".