1165116660 has 96 divisors (see below), whose sum is σ = 3332206080. Its totient is φ = 304090752.

The previous prime is 1165116619. The next prime is 1165116661. The reversal of 1165116660 is 666115611.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1165116661) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1001239 + ... + 1002401.

It is an arithmetic number, because the mean of its divisors is an integer number (34710480).

Almost surely, 2^1165116660 is an apocalyptic number.

1165116660 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 1165116660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1666103040).

1165116660 is an abundant number, since it is smaller than the sum of its proper divisors (2167089420).

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

1165116660 is a wasteful number, since it uses less digits than its factorization.

1165116660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1517 (or 1515 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 33.

The square root of 1165116660 is about 34133.8052376233. The cubic root of 1165116660 is about 1052.2601834925.

The spelling of 1165116660 in words is "one billion, one hundred sixty-five million, one hundred sixteen thousand, six hundred sixty".