1066457321 has 2 divisors, whose sum is σ = 1066457322. Its totient is φ = 1066457320.

The previous prime is 1066457269. The next prime is 1066457323. The reversal of 1066457321 is 1237546601.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 672831721 + 393625600 = 25939^2 + 19840^2 .

It is an emirp because it is prime and its reverse (1237546601) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1066457321 - 2¹⁰ = 1066456297 is a prime.

It is a super-2 number, since 2×1066457321² = 2274662435028994082, which contains 22 as substring.

Together with 1066457323, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1066457323) 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, 533228660 + 533228661.

It is an arithmetic number, because the mean of its divisors is an integer number (533228661).

Almost surely, 2^1066457321 is an apocalyptic number.

It is an amenable number.

1066457321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1066457321 is an equidigital number, since it uses as much as digits as its factorization.

1066457321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 1066457321 is about 32656.6581419471. The cubic root of 1066457321 is about 1021.6790623351.

The spelling of 1066457321 in words is "one billion, sixty-six million, four hundred fifty-seven thousand, three hundred twenty-one".