1660011165 has 20 divisors (see below), whose sum is σ = 2975724444. Its totient is φ = 885339072.

The previous prime is 1660011137. The next prime is 1660011181. The reversal of 1660011165 is 5611100661.

1660011165 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 798119001 + 861892164 = 28251^2 + 29358^2 .

It is not a de Polignac number, because 1660011165 - 2⁷ = 1660011037 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2048992 + ... + 2049801.

Almost surely, 2^1660011165 is an apocalyptic number.

1660011165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1660011165 is a deficient number, since it is larger than the sum of its proper divisors (1315713279).

1660011165 is an equidigital number, since it uses as much as digits as its factorization.

1660011165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4098810 (or 4098801 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 27.

The square root of 1660011165 is about 40743.2345917700. The cubic root of 1660011165 is about 1184.0508021349.

The spelling of 1660011165 in words is "one billion, six hundred sixty million, eleven thousand, one hundred sixty-five".