16666643400 has 96 divisors (see below), whose sum is σ = 56363580000. Its totient is φ = 4040396800.

The previous prime is 16666643381. The next prime is 16666643417. The reversal of 16666643400 is 434666661.

16666643400 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 1256025 + ... + 1269224.

It is an arithmetic number, because the mean of its divisors is an integer number (587120625).

Almost surely, 2^16666643400 is an apocalyptic number.

16666643400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16666643400 is an abundant number, since it is smaller than the sum of its proper divisors (39696936600).

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

16666643400 is a wasteful number, since it uses less digits than its factorization.

16666643400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2525279 (or 2525270 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 42.

It can be divided in two parts, 16666 and 643400, that added together give a palindrome (660066).

The spelling of 16666643400 in words is "sixteen billion, six hundred sixty-six million, six hundred forty-three thousand, four hundred".