6866406 has 12 divisors (see below), whose sum is σ = 14877252. Its totient is φ = 2288796.

The previous prime is 6866389. The next prime is 6866411. The reversal of 6866406 is 6046686.

6866406 is a `hidden beast` number, since 6 + 8 + 6 + 640 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 190716 + ... + 190751.

It is an arithmetic number, because the mean of its divisors is an integer number (1239771).

Almost surely, 2^6866406 is an apocalyptic number.

6866406 is an abundant number, since it is smaller than the sum of its proper divisors (8010846).

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

6866406 is a wasteful number, since it uses less digits than its factorization.

6866406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381475 (or 381472 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 6866406 is about 2620.3827964631. The cubic root of 6866406 is about 190.0683595204.

The spelling of 6866406 in words is "six million, eight hundred sixty-six thousand, four hundred six".