20766542555166 has 16 divisors (see below), whose sum is σ = 41706863712000. Its totient is φ = 6893217751448.

The previous prime is 20766542555123. The next prime is 20766542555237. The reversal of 20766542555166 is 66155524566702.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7240773516 + ... + 7240776383.

It is an arithmetic number, because the mean of its divisors is an integer number (2606678982000).

Almost surely, 2^{20766542555166} is an apocalyptic number.

20766542555166 is an abundant number, since it is smaller than the sum of its proper divisors (20940321156834).

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

20766542555166 is a wasteful number, since it uses less digits than its factorization.

20766542555166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14481550143.

The product of its (nonzero) digits is 90720000, while the sum is 60.

The spelling of 20766542555166 in words is "twenty trillion, seven hundred sixty-six billion, five hundred forty-two million, five hundred fifty-five thousand, one hundred sixty-six".