1166509860000 has 960 divisors, whose sum is σ = 4178019605760. Its totient is φ = 284078080000.

The previous prime is 1166509859971. The next prime is 1166509860001. The reversal of 1166509860000 is 689056611.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1166509860001) by changing a digit.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 2998739806 + ... + 2998740194.

It is an arithmetic number, because the mean of its divisors is an integer number (4352103756).

Almost surely, 2^{1166509860000} is an apocalyptic number.

1166509860000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1166509860000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2089009802880).

1166509860000 is an abundant number, since it is smaller than the sum of its proper divisors (3011509745760).

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

1166509860000 is a wasteful number, since it uses less digits than its factorization.

1166509860000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 539 (or 516 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 42.

The spelling of 1166509860000 in words is "one trillion, one hundred sixty-six billion, five hundred nine million, eight hundred sixty thousand".