1066323501209 has 2 divisors, whose sum is σ = 1066323501210. Its totient is φ = 1066323501208.

The previous prime is 1066323501197. The next prime is 1066323501233. The reversal of 1066323501209 is 9021053236601.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 896187875584 + 170135625625 = 946672^2 + 412475^2 .

It is a cyclic number.

It is not a de Polignac number, because 1066323501209 - 2²⁸ = 1066055065753 is a prime.

It is a super-2 number, since 2×1066323501209² (a number of 25 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1066323501239) 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, 533161750604 + 533161750605.

It is an arithmetic number, because the mean of its divisors is an integer number (533161750605).

Almost surely, 2^{1066323501209} is an apocalyptic number.

It is an amenable number.

1066323501209 is a deficient number, since it is larger than the sum of its proper divisors (1).

1066323501209 is an equidigital number, since it uses as much as digits as its factorization.

1066323501209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 58320, while the sum is 38.

The spelling of 1066323501209 in words is "one trillion, sixty-six billion, three hundred twenty-three million, five hundred one thousand, two hundred nine".