166681816833336 has 32 divisors (see below), whose sum is σ = 476233762381440. Its totient is φ = 47623376238048.

The previous prime is 166681816833331. The next prime is 166681816833361. The reversal of 166681816833336 is 633338618186661.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166681816833331) 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, 496076835646 + ... + 496076835981.

It is an arithmetic number, because the mean of its divisors is an integer number (14882305074420).

Almost surely, 2^{166681816833336} is an apocalyptic number.

It is an amenable number.

166681816833336 is an abundant number, since it is smaller than the sum of its proper divisors (309551945548104).

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

166681816833336 is a wasteful number, since it uses less digits than its factorization.

166681816833336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 992153671643 (or 992153671639 counting only the distinct ones).

The product of its digits is 322486272, while the sum is 69.

The spelling of 166681816833336 in words is "one hundred sixty-six trillion, six hundred eighty-one billion, eight hundred sixteen million, eight hundred thirty-three thousand, three hundred thirty-six".