1666109927196 has 144 divisors (see below), whose sum is σ = 5162965516800. Its totient is φ = 445781888640.

The previous prime is 1666109927191. The next prime is 1666109927243. The reversal of 1666109927196 is 6917299016661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1666109927191) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6917296 + ... + 7154103.

It is an arithmetic number, because the mean of its divisors is an integer number (35853927200).

Almost surely, 2^{1666109927196} is an apocalyptic number.

It is an amenable number.

1666109927196 is an abundant number, since it is smaller than the sum of its proper divisors (3496855589604).

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

1666109927196 is a wasteful number, since it uses less digits than its factorization.

1666109927196 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14071456 (or 14071451 counting only the distinct ones).

The product of its (nonzero) digits is 13226976, while the sum is 63.

The spelling of 1666109927196 in words is "one trillion, six hundred sixty-six billion, one hundred nine million, nine hundred twenty-seven thousand, one hundred ninety-six".