1165560660 has 72 divisors (see below), whose sum is σ = 3856952736. Its totient is φ = 282559680.

The previous prime is 1165560659. The next prime is 1165560689. The reversal of 1165560660 is 660655611.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 292354 + ... + 296313.

It is an arithmetic number, because the mean of its divisors is an integer number (53568788).

Almost surely, 2^1165560660 is an apocalyptic number.

1165560660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1165560660 is an abundant number, since it is smaller than the sum of its proper divisors (2691392076).

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

1165560660 is a wasteful number, since it uses less digits than its factorization.

1165560660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 588693 (or 588688 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 1165560660 is about 34140.3084344591. The cubic root of 1165560660 is about 1052.3938308210.

The spelling of 1165560660 in words is "one billion, one hundred sixty-five million, five hundred sixty thousand, six hundred sixty".