16466645727840 has 384 divisors, whose sum is σ = 64676403735552. Its totient is φ = 3421249413120.

The previous prime is 16466645727827. The next prime is 16466645727871. The reversal of 16466645727840 is 4872754666461.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is a congruent number.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 414412614 + ... + 414452346.

It is an arithmetic number, because the mean of its divisors is an integer number (168428134728).

Almost surely, 2^{16466645727840} is an apocalyptic number.

16466645727840 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 16466645727840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32338201867776).

16466645727840 is an abundant number, since it is smaller than the sum of its proper divisors (48209758007712).

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

16466645727840 is a wasteful number, since it uses less digits than its factorization.

16466645727840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50982 (or 50974 counting only the distinct ones).

The product of its (nonzero) digits is 325140480, while the sum is 66.

The spelling of 16466645727840 in words is "sixteen trillion, four hundred sixty-six billion, six hundred forty-five million, seven hundred twenty-seven thousand, eight hundred forty".