66031222529 has 2 divisors, whose sum is σ = 66031222530. Its totient is φ = 66031222528.

The previous prime is 66031222511. The next prime is 66031222577. The reversal of 66031222529 is 92522213066.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 58142230129 + 7888992400 = 241127^2 + 88820^2 .

It is a cyclic number.

It is not a de Polignac number, because 66031222529 - 2¹⁶ = 66031156993 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 66031222492 and 66031222501.

It is not a weakly prime, because it can be changed into another prime (66031222729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33015611264 + 33015611265.

It is an arithmetic number, because the mean of its divisors is an integer number (33015611265).

Almost surely, 2^66031222529 is an apocalyptic number.

It is an amenable number.

66031222529 is a deficient number, since it is larger than the sum of its proper divisors (1).

66031222529 is an equidigital number, since it uses as much as digits as its factorization.

66031222529 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 77760, while the sum is 38.

The spelling of 66031222529 in words is "sixty-six billion, thirty-one million, two hundred twenty-two thousand, five hundred twenty-nine".