1166005065 has 16 divisors (see below), whose sum is σ = 1866484800. Its totient is φ = 621577152.

The previous prime is 1166005063. The next prime is 1166005069. The reversal of 1166005065 is 5605006611.

It is not a de Polignac number, because 1166005065 - 2¹ = 1166005063 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1166005063) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16906 + ... + 51164.

It is an arithmetic number, because the mean of its divisors is an integer number (116655300).

Almost surely, 2^1166005065 is an apocalyptic number.

1166005065 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1166005065 is a deficient number, since it is larger than the sum of its proper divisors (700479735).

1166005065 is a wasteful number, since it uses less digits than its factorization.

1166005065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36536.

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 1166005065 is about 34146.8163230483. The cubic root of 1166005065 is about 1052.5275660750.

The spelling of 1166005065 in words is "one billion, one hundred sixty-six million, five thousand, sixty-five".