6866660 has 12 divisors (see below), whose sum is σ = 14420028. Its totient is φ = 2746656.

The previous prime is 6866659. The next prime is 6866663. The reversal of 6866660 is 666686.

It can be written as a sum of positive squares in 2 ways, for example, as 4426816 + 2439844 = 2104^2 + 1562^2 .

It is not an unprimeable number, because it can be changed into a prime (6866663) 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 3 ways as a sum of consecutive naturals, for example, 171647 + ... + 171686.

It is an arithmetic number, because the mean of its divisors is an integer number (1201669).

Almost surely, 2^6866660 is an apocalyptic number.

It is an amenable number.

6866660 is an abundant number, since it is smaller than the sum of its proper divisors (7553368).

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

6866660 is a wasteful number, since it uses less digits than its factorization.

6866660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343342 (or 343340 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 38.

The square root of 6866660 is about 2620.4312622162. The cubic root of 6866660 is about 190.0707031418.

The spelling of 6866660 in words is "six million, eight hundred sixty-six thousand, six hundred sixty".