1066866908449 has 2 divisors, whose sum is σ = 1066866908450. Its totient is φ = 1066866908448.

The previous prime is 1066866908441. The next prime is 1066866908479. The reversal of 1066866908449 is 9448096686601.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 710210707600 + 356656200849 = 842740^2 + 597207^2 .

It is a cyclic number.

It is not a de Polignac number, because 1066866908449 - 2³ = 1066866908441 is a prime.

It is a super-2 number, since 2×1066866908449² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1066866908441) 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, 533433454224 + 533433454225.

It is an arithmetic number, because the mean of its divisors is an integer number (533433454225).

Almost surely, 2^{1066866908449} is an apocalyptic number.

It is an amenable number.

1066866908449 is a deficient number, since it is larger than the sum of its proper divisors (1).

1066866908449 is an equidigital number, since it uses as much as digits as its factorization.

1066866908449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 107495424, while the sum is 67.

The spelling of 1066866908449 in words is "one trillion, sixty-six billion, eight hundred sixty-six million, nine hundred eight thousand, four hundred forty-nine".