2165666265032 has 16 divisors (see below), whose sum is σ = 4070269441500. Its totient is φ = 1080261080640.

The previous prime is 2165666265011. The next prime is 2165666265041. The reversal of 2165666265032 is 2305626665612.

It can be written as a sum of positive squares in 2 ways, for example, as 2162882014276 + 2784250756 = 1470674^2 + 52766^2 .

It is a super-2 number, since 2×2165666265032² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 321502907 + ... + 321509642.

Almost surely, 2^{2165666265032} is an apocalyptic number.

It is an amenable number.

2165666265032 is a deficient number, since it is larger than the sum of its proper divisors (1904603176468).

2165666265032 is a wasteful number, since it uses less digits than its factorization.

2165666265032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 643012976 (or 643012972 counting only the distinct ones).

The product of its (nonzero) digits is 4665600, while the sum is 50.

The spelling of 2165666265032 in words is "two trillion, one hundred sixty-five billion, six hundred sixty-six million, two hundred sixty-five thousand, thirty-two".