20666056621116 has 12 divisors (see below), whose sum is σ = 48220798782632. Its totient is φ = 6888685540368.

The previous prime is 20666056621097. The next prime is 20666056621123. The reversal of 20666056621116 is 61112665066602.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 861085692535 + ... + 861085692558.

Almost surely, 2^{20666056621116} is an apocalyptic number.

It is an amenable number.

20666056621116 is an abundant number, since it is smaller than the sum of its proper divisors (27554742161516).

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

20666056621116 is a wasteful number, since it uses less digits than its factorization.

20666056621116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1722171385100 (or 1722171385098 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 48.

The spelling of 20666056621116 in words is "twenty trillion, six hundred sixty-six billion, fifty-six million, six hundred twenty-one thousand, one hundred sixteen".