20722414725666 has 96 divisors (see below), whose sum is σ = 50164101748800. Its totient is φ = 6143924597760.

The previous prime is 20722414725643. The next prime is 20722414725671. The reversal of 20722414725666 is 66652741422702.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1979320 + ... + 6735171.

It is an arithmetic number, because the mean of its divisors is an integer number (522542726550).

Almost surely, 2^{20722414725666} is an apocalyptic number.

20722414725666 is an abundant number, since it is smaller than the sum of its proper divisors (29441687023134).

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

20722414725666 is a wasteful number, since it uses less digits than its factorization.

20722414725666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8714944 (or 8714941 counting only the distinct ones).

The product of its (nonzero) digits is 13547520, while the sum is 54.

The spelling of 20722414725666 in words is "twenty trillion, seven hundred twenty-two billion, four hundred fourteen million, seven hundred twenty-five thousand, six hundred sixty-six".