11665999170 has 96 divisors (see below), whose sum is σ = 34744469760. Its totient is φ = 2660376960.

The previous prime is 11665999117. The next prime is 11665999171. The reversal of 11665999170 is 7199956611.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (11665999171) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 255480 + ... + 297660.

It is an arithmetic number, because the mean of its divisors is an integer number (361921560).

Almost surely, 2^11665999170 is an apocalyptic number.

11665999170 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 11665999170, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17372234880).

11665999170 is an abundant number, since it is smaller than the sum of its proper divisors (23078470590).

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

11665999170 is a wasteful number, since it uses less digits than its factorization.

11665999170 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42640 (or 42637 counting only the distinct ones).

The product of its (nonzero) digits is 918540, while the sum is 54.

The spelling of 11665999170 in words is "eleven billion, six hundred sixty-five million, nine hundred ninety-nine thousand, one hundred seventy".