21660402066112 has 28 divisors (see below), whose sum is σ = 42995573908096. Its totient is φ = 10826871632640.

The previous prime is 21660402066091. The next prime is 21660402066157. The reversal of 21660402066112 is 21166020406612.

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, 51812064 + ... + 52228447.

Almost surely, 2^{21660402066112} is an apocalyptic number.

It is an amenable number.

21660402066112 is a deficient number, since it is larger than the sum of its proper divisors (21335171841984).

21660402066112 is a wasteful number, since it uses less digits than its factorization.

21660402066112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104043776 (or 104043766 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 37.

The spelling of 21660402066112 in words is "twenty-one trillion, six hundred sixty billion, four hundred two million, sixty-six thousand, one hundred twelve".