66782285137 has 2 divisors, whose sum is σ = 66782285138. Its totient is φ = 66782285136.

The previous prime is 66782285117. The next prime is 66782285159. The reversal of 66782285137 is 73158228766.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38245278096 + 28537007041 = 195564^2 + 168929^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66782285137 is a prime.

It is a super-2 number, since 2×66782285137² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (66782285107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33391142568 + 33391142569.

It is an arithmetic number, because the mean of its divisors is an integer number (33391142569).

Almost surely, 2^66782285137 is an apocalyptic number.

It is an amenable number.

66782285137 is a deficient number, since it is larger than the sum of its proper divisors (1).

66782285137 is an equidigital number, since it uses as much as digits as its factorization.

66782285137 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6773760, while the sum is 55.

The spelling of 66782285137 in words is "sixty-six billion, seven hundred eighty-two million, two hundred eighty-five thousand, one hundred thirty-seven".