2166257705012 has 24 divisors (see below), whose sum is σ = 3830726827200. Its totient is φ = 1071780647616.

The previous prime is 2166257704981. The next prime is 2166257705039. The reversal of 2166257705012 is 2105077526612.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1508462 + ... + 2570597.

It is an arithmetic number, because the mean of its divisors is an integer number (159613617800).

Almost surely, 2^{2166257705012} is an apocalyptic number.

It is an amenable number.

2166257705012 is a deficient number, since it is larger than the sum of its proper divisors (1664469122188).

2166257705012 is a wasteful number, since it uses less digits than its factorization.

2166257705012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4080455 (or 4080453 counting only the distinct ones).

The product of its (nonzero) digits is 352800, while the sum is 44.

The spelling of 2166257705012 in words is "two trillion, one hundred sixty-six billion, two hundred fifty-seven million, seven hundred five thousand, twelve".