18170944856066 has 16 divisors (see below), whose sum is σ = 28136131107840. Its totient is φ = 8792244373440.

The previous prime is 18170944856023. The next prime is 18170944856069. The reversal of 18170944856066 is 66065844907181.

It is a junction number, because it is equal to n+sod(n) for n = 18170944855993 and 18170944856011.

It is not an unprimeable number, because it can be changed into a prime (18170944856069) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1279415 + ... + 6162693.

It is an arithmetic number, because the mean of its divisors is an integer number (1758508194240).

Almost surely, 2^{18170944856066} is an apocalyptic number.

18170944856066 is a deficient number, since it is larger than the sum of its proper divisors (9965186251774).

18170944856066 is a wasteful number, since it uses less digits than its factorization.

18170944856066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4943329.

The product of its (nonzero) digits is 69672960, while the sum is 65.

The spelling of 18170944856066 in words is "eighteen trillion, one hundred seventy billion, nine hundred forty-four million, eight hundred fifty-six thousand, sixty-six".