1166645160 has 128 divisors (see below), whose sum is σ = 3983817600. Its totient is φ = 303505920.

The previous prime is 1166645131. The next prime is 1166645171. The reversal of 1166645160 is 615466611.

It is a happy number.

It is a super-2 number, since 2×1166645160² = 2722121858702851200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31107 + ... + 57453.

It is an arithmetic number, because the mean of its divisors is an integer number (31123575).

Almost surely, 2^1166645160 is an apocalyptic number.

1166645160 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 1166645160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1991908800).

1166645160 is an abundant number, since it is smaller than the sum of its proper divisors (2817172440).

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

1166645160 is a wasteful number, since it uses less digits than its factorization.

1166645160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26408 (or 26398 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 1166645160 is about 34156.1877263842. The cubic root of 1166645160 is about 1052.7201308153.

The spelling of 1166645160 in words is "one billion, one hundred sixty-six million, six hundred forty-five thousand, one hundred sixty".