20662166706172 has 12 divisors (see below), whose sum is σ = 36159834649680. Its totient is φ = 10330785377696.

The previous prime is 20662166706157. The next prime is 20662166706193. The reversal of 20662166706172 is 27160766126602.

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, 74337793 + ... + 74615224.

It is an arithmetic number, because the mean of its divisors is an integer number (3013319554140).

Almost surely, 2^{20662166706172} is an apocalyptic number.

It is an amenable number.

20662166706172 is a deficient number, since it is larger than the sum of its proper divisors (15497667943508).

20662166706172 is a wasteful number, since it uses less digits than its factorization.

20662166706172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148987700 (or 148987698 counting only the distinct ones).

The product of its (nonzero) digits is 3048192, while the sum is 52.

The spelling of 20662166706172 in words is "twenty trillion, six hundred sixty-two billion, one hundred sixty-six million, seven hundred six thousand, one hundred seventy-two".