16661228251360 has 768 divisors, whose sum is σ = 54504829145088. Its totient is φ = 4650644275200.

The previous prime is 16661228251331. The next prime is 16661228251453. The reversal of 16661228251360 is 6315282216661.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 929695200 + ... + 929713120.

It is an arithmetic number, because the mean of its divisors is an integer number (70969829616).

Almost surely, 2^{16661228251360} is an apocalyptic number.

16661228251360 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 16661228251360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27252414572544).

16661228251360 is an abundant number, since it is smaller than the sum of its proper divisors (37843600893728).

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

16661228251360 is a wasteful number, since it uses less digits than its factorization.

16661228251360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18187 (or 18179 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 49.

The spelling of 16661228251360 in words is "sixteen trillion, six hundred sixty-one billion, two hundred twenty-eight million, two hundred fifty-one thousand, three hundred sixty".