21066006744576 has 120 divisors (see below), whose sum is σ = 64374270390144. Its totient is φ = 6608943267840.

The previous prime is 21066006744551. The next prime is 21066006744599. The reversal of 21066006744576 is 67544760066012.

21066006744576 is a `hidden beast` number, since 2 + 1 + 0 + 6 + 6 + 0 + 0 + 67 + 4 + 4 + 576 = 666.

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, 134380960 + ... + 134537631.

Almost surely, 2^{21066006744576} is an apocalyptic number.

It is an amenable number.

21066006744576 is an abundant number, since it is smaller than the sum of its proper divisors (43308263645568).

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

21066006744576 is a wasteful number, since it uses less digits than its factorization.

21066006744576 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268918632 (or 268918613 counting only the distinct ones).

The product of its (nonzero) digits is 10160640, while the sum is 54.

The spelling of 21066006744576 in words is "twenty-one trillion, sixty-six billion, six million, seven hundred forty-four thousand, five hundred seventy-six".