1806666120000 has 1960 divisors, whose sum is σ = 7868065113216. Its totient is φ = 402734592000.

The previous prime is 1806666119953. The next prime is 1806666120019. The reversal of 1806666120000 is 216666081.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 279 ways as a sum of consecutive naturals, for example, 10818359917 + ... + 10818360083.

Almost surely, 2^{1806666120000} is an apocalyptic number.

1806666120000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1806666120000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3934032556608).

1806666120000 is an abundant number, since it is smaller than the sum of its proper divisors (6061398993216).

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

1806666120000 is an frugal number, since it uses more digits than its factorization.

1806666120000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277 (or 237 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The spelling of 1806666120000 in words is "one trillion, eight hundred six billion, six hundred sixty-six million, one hundred twenty thousand".