16661055756100 has 144 divisors (see below), whose sum is σ = 43769324833920. Its totient is φ = 5373962496000.

The previous prime is 16661055756089. The next prime is 16661055756101. The reversal of 16661055756100 is 165755016661.

It is not an unprimeable number, because it can be changed into a prime (16661055756101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 26692575 + ... + 27309625.

It is an arithmetic number, because the mean of its divisors is an integer number (303953644680).

Almost surely, 2^{16661055756100} is an apocalyptic number.

16661055756100 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 16661055756100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21884662416960).

16661055756100 is an abundant number, since it is smaller than the sum of its proper divisors (27108269077820).

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

16661055756100 is a wasteful number, since it uses less digits than its factorization.

16661055756100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 619358 (or 619351 counting only the distinct ones).

The product of its (nonzero) digits is 1134000, while the sum is 49.

The spelling of 16661055756100 in words is "sixteen trillion, six hundred sixty-one billion, fifty-five million, seven hundred fifty-six thousand, one hundred".