1066277161 has 4 divisors (see below), whose sum is σ = 1086395652. Its totient is φ = 1046158672.

The previous prime is 1066277159. The next prime is 1066277167. The reversal of 1066277161 is 1617726601.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 941262400 + 125014761 = 30680^2 + 11181^2 .

It is a cyclic number.

It is not a de Polignac number, because 1066277161 - 2¹ = 1066277159 is a prime.

It is a super-2 number, since 2×1066277161² = 2273893968140439842, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1066277161.

It is not an unprimeable number, because it can be changed into a prime (1066277167) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10059166 + ... + 10059271.

It is an arithmetic number, because the mean of its divisors is an integer number (271598913).

Almost surely, 2^1066277161 is an apocalyptic number.

It is an amenable number.

1066277161 is a deficient number, since it is larger than the sum of its proper divisors (20118491).

1066277161 is an equidigital number, since it uses as much as digits as its factorization.

1066277161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20118490.

The product of its (nonzero) digits is 21168, while the sum is 37.

The square root of 1066277161 is about 32653.8996292939. The cubic root of 1066277161 is about 1021.6215272726.

The spelling of 1066277161 in words is "one billion, sixty-six million, two hundred seventy-seven thousand, one hundred sixty-one".