1166560161165 has 128 divisors (see below), whose sum is σ = 2378434544640. Its totient is φ = 531424972800.

The previous prime is 1166560161119. The next prime is 1166560161181. The reversal of 1166560161165 is 5611610656611.

1166560161165 is a `hidden beast` number, since 1 + 1 + 6 + 6 + 560 + 16 + 11 + 65 = 666.

It is not a de Polignac number, because 1166560161165 - 2⁶ = 1166560161101 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

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 1166560161165.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 477901345 + ... + 477903785.

It is an arithmetic number, because the mean of its divisors is an integer number (18581519880).

Almost surely, 2^{1166560161165} is an apocalyptic number.

1166560161165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1166560161165 is an abundant number, since it is smaller than the sum of its proper divisors (1211874383475).

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

1166560161165 is a wasteful number, since it uses less digits than its factorization.

1166560161165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4020 (or 4014 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 45.

The spelling of 1166560161165 in words is "one trillion, one hundred sixty-six billion, five hundred sixty million, one hundred sixty-one thousand, one hundred sixty-five".