1066436641 has 2 divisors, whose sum is σ = 1066436642. Its totient is φ = 1066436640.

The previous prime is 1066436629. The next prime is 1066436647. The reversal of 1066436641 is 1466346601.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1066349025 + 87616 = 32655^2 + 296^2 .

It is a cyclic number.

It is not a de Polignac number, because 1066436641 - 2¹⁵ = 1066403873 is a prime.

It is a super-2 number, since 2×1066436641² = 2274574218534725762, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1066436641.

It is not a weakly prime, because it can be changed into another prime (1066436647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 533218320 + 533218321.

It is an arithmetic number, because the mean of its divisors is an integer number (533218321).

Almost surely, 2^1066436641 is an apocalyptic number.

It is an amenable number.

1066436641 is a deficient number, since it is larger than the sum of its proper divisors (1).

1066436641 is an equidigital number, since it uses as much as digits as its factorization.

1066436641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62208, while the sum is 37.

The square root of 1066436641 is about 32656.3415127904. The cubic root of 1066436641 is about 1021.6724583954.

The spelling of 1066436641 in words is "one billion, sixty-six million, four hundred thirty-six thousand, six hundred forty-one".