1066057805 has 4 divisors (see below), whose sum is σ = 1279269372. Its totient is φ = 852846240.

The previous prime is 1066057747. The next prime is 1066057813. The reversal of 1066057805 is 5087506601.

It is a happy number.

1066057805 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5087506601 = 43 ⋅118314107.

It can be written as a sum of positive squares in 2 ways, for example, as 695957161 + 370100644 = 26381^2 + 19238^2 .

It is not a de Polignac number, because 1066057805 - 2⁸ = 1066057549 is a prime.

It is a super-2 number, since 2×1066057805² = 2272958487202836050, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106605776 + ... + 106605785.

It is an arithmetic number, because the mean of its divisors is an integer number (319817343).

Almost surely, 2^1066057805 is an apocalyptic number.

It is an amenable number.

1066057805 is a deficient number, since it is larger than the sum of its proper divisors (213211567).

1066057805 is an equidigital number, since it uses as much as digits as its factorization.

1066057805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213211566.

The product of its (nonzero) digits is 50400, while the sum is 38.

The square root of 1066057805 is about 32650.5406540229. The cubic root of 1066057805 is about 1021.5514660074.

The spelling of 1066057805 in words is "one billion, sixty-six million, fifty-seven thousand, eight hundred five".