1066558775 has 6 divisors (see below), whose sum is σ = 1322532912. Its totient is φ = 853247000.

The previous prime is 1066558769. The next prime is 1066558777. The reversal of 1066558775 is 5778556601.

It is a happy number.

It is not a de Polignac number, because 1066558775 - 2¹² = 1066554679 is a prime.

It is a super-2 number, since 2×1066558775² = 2275095241059001250, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1066558777) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 21331151 + ... + 21331200.

It is an arithmetic number, because the mean of its divisors is an integer number (220422152).

Almost surely, 2^1066558775 is an apocalyptic number.

1066558775 is a deficient number, since it is larger than the sum of its proper divisors (255974137).

1066558775 is an equidigital number, since it uses as much as digits as its factorization.

1066558775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42662361 (or 42662356 counting only the distinct ones).

The product of its (nonzero) digits is 1764000, while the sum is 50.

The square root of 1066558775 is about 32658.2114482713. The cubic root of 1066558775 is about 1021.7114593624.

The spelling of 1066558775 in words is "one billion, sixty-six million, five hundred fifty-eight thousand, seven hundred seventy-five".