16666671666667 has 16 divisors (see below), whose sum is σ = 18569215010304. Its totient is φ = 14828712444000.

The previous prime is 16666671666649. The next prime is 16666671666679. The reversal of 16666671666667 is 76666617666661.

16666671666667 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 16666671666667 - 2³⁵ = 16632311928299 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16666671666593 and 16666671666602.

It is not an unprimeable number, because it can be changed into a prime (16666671661667) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17878792 + ... + 18787882.

It is an arithmetic number, because the mean of its divisors is an integer number (1160575938144).

Almost surely, 2^{16666671666667} is an apocalyptic number.

16666671666667 is the 3333334-th pentagonal number.

16666671666667 is a deficient number, since it is larger than the sum of its proper divisors (1902543343637).

16666671666667 is a wasteful number, since it uses less digits than its factorization.

16666671666667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 944610.

The product of its digits is 2962842624, while the sum is 76.

The spelling of 16666671666667 in words is "sixteen trillion, six hundred sixty-six billion, six hundred seventy-one million, six hundred sixty-six thousand, six hundred sixty-seven".