21666342445162 has 8 divisors (see below), whose sum is σ = 32499639344196. Its totient is φ = 10833129330432.

The previous prime is 21666342445133. The next prime is 21666342445177. The reversal of 21666342445162 is 26154424366612.

It can be written as a sum of positive squares in 2 ways, for example, as 21614121511801 + 52220933361 = 4649099^2 + 228519^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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, 20295543 + ... + 21336394.

Almost surely, 2^{21666342445162} is an apocalyptic number.

21666342445162 is a deficient number, since it is larger than the sum of its proper divisors (10833296899034).

21666342445162 is a wasteful number, since it uses less digits than its factorization.

21666342445162 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41892152.

The product of its digits is 9953280, while the sum is 52.

The spelling of 21666342445162 in words is "twenty-one trillion, six hundred sixty-six billion, three hundred forty-two million, four hundred forty-five thousand, one hundred sixty-two".