1165604166 has 24 divisors (see below), whose sum is σ = 2635279920. Its totient is φ = 371641776.

The previous prime is 1165604161. The next prime is 1165604173. The reversal of 1165604166 is 6614065611.

It is a happy number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1165604166.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1165604161) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1407321 + ... + 1408148.

It is an arithmetic number, because the mean of its divisors is an integer number (109803330).

Almost surely, 2^1165604166 is an apocalyptic number.

1165604166 is an abundant number, since it is smaller than the sum of its proper divisors (1469675754).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1165604166 is a wasteful number, since it uses less digits than its factorization.

1165604166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2815500 (or 2815497 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 1165604166 is about 34140.9455932316. The cubic root of 1165604166 is about 1052.4069246272.

Adding to 1165604166 its reverse (6614065611), we get a palindrome (7779669777).

The spelling of 1165604166 in words is "one billion, one hundred sixty-five million, six hundred four thousand, one hundred sixty-six".