1166165575 has 18 divisors (see below), whose sum is σ = 1536119936. Its totient is φ = 878048640.

The previous prime is 1166165563. The next prime is 1166165587. The reversal of 1166165575 is 5755616611.

It is an interprime number because it is at equal distance from previous prime (1166165563) and next prime (1166165587).

It is not a de Polignac number, because 1166165575 - 2²⁹ = 629294663 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 73479 + ... + 87928.

Almost surely, 2^1166165575 is an apocalyptic number.

1166165575 is a deficient number, since it is larger than the sum of its proper divisors (369954361).

1166165575 is a wasteful number, since it uses less digits than its factorization.

1166165575 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161451 (or 161429 counting only the distinct ones).

The product of its digits is 189000, while the sum is 43.

The square root of 1166165575 is about 34149.1665344851. The cubic root of 1166165575 is about 1052.5758601614.

The spelling of 1166165575 in words is "one billion, one hundred sixty-six million, one hundred sixty-five thousand, five hundred seventy-five".