6866478 has 16 divisors (see below), whose sum is σ = 15258960. Its totient is φ = 2288808.

The previous prime is 6866473. The next prime is 6866513. The reversal of 6866478 is 8746686.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6866471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63525 + ... + 63632.

It is an arithmetic number, because the mean of its divisors is an integer number (953685).

Almost surely, 2^6866478 is an apocalyptic number.

6866478 is an abundant number, since it is smaller than the sum of its proper divisors (8392482).

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

6866478 is a wasteful number, since it uses less digits than its factorization.

6866478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127168 (or 127162 counting only the distinct ones).

The product of its digits is 387072, while the sum is 45.

The square root of 6866478 is about 2620.3965348779. The cubic root of 6866478 is about 190.0690238599.

The spelling of 6866478 in words is "six million, eight hundred sixty-six thousand, four hundred seventy-eight".