16666810000 has 75 divisors (see below), whose sum is σ = 40383294303. Its totient is φ = 6661560000.

The previous prime is 16666809983. The next prime is 16666810009. The reversal of 16666810000 is 1866661.

The square root of 16666810000 is 129100.

It is a perfect power (a square), and thus also a powerful number.

16666810000 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 1306677904 + 15360132096 = 36148^2 + 123936^2 .

It is a super-2 number, since 2×16666810000² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16666810009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 12909355 + ... + 12910645.

Almost surely, 2^16666810000 is an apocalyptic number.

16666810000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16666810000 is the 129100-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16666810000

16666810000 is an abundant number, since it is smaller than the sum of its proper divisors (23716484303).

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

16666810000 is an frugal number, since it uses more digits than its factorization.

16666810000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2610 (or 1298 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 34.

The spelling of 16666810000 in words is "sixteen billion, six hundred sixty-six million, eight hundred ten thousand".