1066289261 has 2 divisors, whose sum is σ = 1066289262. Its totient is φ = 1066289260.

The previous prime is 1066289251. The next prime is 1066289267. The reversal of 1066289261 is 1629826601.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 759829225 + 306460036 = 27565^2 + 17506^2 .

It is a cyclic number.

It is not a de Polignac number, because 1066289261 - 2¹⁸ = 1066027117 is a prime.

It is a super-2 number, since 2×1066289261² = 2273945576247852242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1066289267) 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, 533144630 + 533144631.

It is an arithmetic number, because the mean of its divisors is an integer number (533144631).

Almost surely, 2^1066289261 is an apocalyptic number.

It is an amenable number.

1066289261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1066289261 is an equidigital number, since it uses as much as digits as its factorization.

1066289261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 1066289261 is about 32654.0849052611. The cubic root of 1066289261 is about 1021.6253916755.

The spelling of 1066289261 in words is "one billion, sixty-six million, two hundred eighty-nine thousand, two hundred sixty-one".