1166501500 has 48 divisors (see below), whose sum is σ = 2554022016. Its totient is φ = 465432000.

The previous prime is 1166501489. The next prime is 1166501503. The reversal of 1166501500 is 51056611.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1166501503) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 212794 + ... + 218206.

It is an arithmetic number, because the mean of its divisors is an integer number (53208792).

Almost surely, 2^1166501500 is an apocalyptic number.

1166501500 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 1166501500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1277011008).

1166501500 is an abundant number, since it is smaller than the sum of its proper divisors (1387520516).

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

1166501500 is a wasteful number, since it uses less digits than its factorization.

1166501500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5863 (or 5851 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 25.

The square root of 1166501500 is about 34154.0846751893. The cubic root of 1166501500 is about 1052.6769185953.

The spelling of 1166501500 in words is "one billion, one hundred sixty-six million, five hundred one thousand, five hundred".