16664726472500 has 120 divisors (see below), whose sum is σ = 36568336792680. Its totient is φ = 6642892800000.

The previous prime is 16664726472469. The next prime is 16664726472503. The reversal of 16664726472500 is 527462746661.

It can be written as a sum of positive squares in 20 ways, for example, as 11762416811044 + 4902309661456 = 3429638^2 + 2214116^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16664726472503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1084864820 + ... + 1084880180.

It is an arithmetic number, because the mean of its divisors is an integer number (304736139939).

Almost surely, 2^{16664726472500} is an apocalyptic number.

16664726472500 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 16664726472500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18284168396340).

16664726472500 is an abundant number, since it is smaller than the sum of its proper divisors (19903610320180).

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

16664726472500 is a wasteful number, since it uses less digits than its factorization.

16664726472500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16855 (or 16838 counting only the distinct ones).

The product of its (nonzero) digits is 20321280, while the sum is 56.

The spelling of 16664726472500 in words is "sixteen trillion, six hundred sixty-four billion, seven hundred twenty-six million, four hundred seventy-two thousand, five hundred".