1001165001660 has 36 divisors (see below), whose sum is σ = 3036867172248. Its totient is φ = 266977333728.

The previous prime is 1001165001659. The next prime is 1001165001689. The reversal of 1001165001660 is 661005611001.

1001165001660 is a `hidden beast` number, since 1 + 0 + 0 + 1 + 1 + 650 + 0 + 1 + 6 + 6 + 0 = 666.

1001165001660 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-3 number, since 3×1001165001660³ (a number of 37 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2781013714 + ... + 2781014073.

Almost surely, 2^{1001165001660} is an apocalyptic number.

1001165001660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1001165001660 is an abundant number, since it is smaller than the sum of its proper divisors (2035702170588).

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

1001165001660 is a wasteful number, since it uses less digits than its factorization.

1001165001660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5562027802 (or 5562027797 counting only the distinct ones).

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

The spelling of 1001165001660 in words is "one trillion, one billion, one hundred sixty-five million, one thousand, six hundred sixty".