6666887 has 8 divisors (see below), whose sum is σ = 6894720. Its totient is φ = 6442240.

The previous prime is 6666883. The next prime is 6666931. The reversal of 6666887 is 7886666.

6666887 = T₃ + T₄ + ... + T₃₄₁.

6666887 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6666887 - 2² = 6666883 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6666883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3914 + ... + 5352.

It is an arithmetic number, because the mean of its divisors is an integer number (861840).

Almost surely, 2^6666887 is an apocalyptic number.

6666887 is a deficient number, since it is larger than the sum of its proper divisors (227833).

6666887 is a wasteful number, since it uses less digits than its factorization.

6666887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1593.

The product of its digits is 580608, while the sum is 47.

The square root of 6666887 is about 2582.0315644856. The cubic root of 6666887 is about 188.2092791694.

The spelling of 6666887 in words is "six million, six hundred sixty-six thousand, eight hundred eighty-seven".