6667878 has 16 divisors (see below), whose sum is σ = 15240960. Its totient is φ = 1905096.

The previous prime is 6667873. The next prime is 6667889. The reversal of 6667878 is 8787666.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6667873) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79338 + ... + 79421.

It is an arithmetic number, because the mean of its divisors is an integer number (952560).

Almost surely, 2^6667878 is an apocalyptic number.

6667878 is an abundant number, since it is smaller than the sum of its proper divisors (8573082).

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

6667878 is a wasteful number, since it uses less digits than its factorization.

6667878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158771.

The product of its digits is 677376, while the sum is 48.

The square root of 6667878 is about 2582.2234605084. The cubic root of 6667878 is about 188.2186041690.

The spelling of 6667878 in words is "six million, six hundred sixty-seven thousand, eight hundred seventy-eight".