1166321688 has 96 divisors (see below), whose sum is σ = 3517148160. Its totient is φ = 315679680.

The previous prime is 1166321683. The next prime is 1166321699. The reversal of 1166321688 is 8861236611.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1166321683) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 51033 + ... + 70263.

It is an arithmetic number, because the mean of its divisors is an integer number (36636960).

Almost surely, 2^1166321688 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1166321688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1758574080).

1166321688 is an abundant number, since it is smaller than the sum of its proper divisors (2350826472).

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

1166321688 is a wasteful number, since it uses less digits than its factorization.

1166321688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19285 (or 19262 counting only the distinct ones).

The product of its digits is 82944, while the sum is 42.

The square root of 1166321688 is about 34151.4522092399. The cubic root of 1166321688 is about 1052.6228270321.

The spelling of 1166321688 in words is "one billion, one hundred sixty-six million, three hundred twenty-one thousand, six hundred eighty-eight".