1166273065 has 4 divisors (see below), whose sum is σ = 1399527684. Its totient is φ = 933018448.

The previous prime is 1166273033. The next prime is 1166273071. The reversal of 1166273065 is 5603726611.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5603726611 = 7 ⋅800532373.

It can be written as a sum of positive squares in 2 ways, for example, as 831053584 + 335219481 = 28828^2 + 18309^2 .

It is a cyclic number.

It is not a de Polignac number, because 1166273065 - 2⁵ = 1166273033 is a prime.

It is a Duffinian 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, 116627302 + ... + 116627311.

It is an arithmetic number, because the mean of its divisors is an integer number (349881921).

Almost surely, 2^1166273065 is an apocalyptic number.

It is an amenable number.

1166273065 is a deficient number, since it is larger than the sum of its proper divisors (233254619).

1166273065 is an equidigital number, since it uses as much as digits as its factorization.

1166273065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233254618.

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 1166273065 is about 34150.7403287249. The cubic root of 1166273065 is about 1052.6081991665.

Adding to 1166273065 its reverse (5603726611), we get a palindrome (6769999676).

The spelling of 1166273065 in words is "one billion, one hundred sixty-six million, two hundred seventy-three thousand, sixty-five".