6858666 has 12 divisors (see below), whose sum is σ = 14860482. Its totient is φ = 2286216.

The previous prime is 6858661. The next prime is 6858673. The reversal of 6858666 is 6668586.

It can be written as a sum of positive squares in only one way, i.e., 5659641 + 1199025 = 2379^2 + 1095^2 .

It is not an unprimeable number, because it can be changed into a prime (6858661) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 190501 + ... + 190536.

Almost surely, 2^6858666 is an apocalyptic number.

6858666 is an abundant number, since it is smaller than the sum of its proper divisors (8001816).

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

6858666 is a wasteful number, since it uses less digits than its factorization.

6858666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381045 (or 381042 counting only the distinct ones).

The product of its digits is 414720, while the sum is 45.

The square root of 6858666 is about 2618.9054965768. The cubic root of 6858666 is about 189.9969159241.

The spelling of 6858666 in words is "six million, eight hundred fifty-eight thousand, six hundred sixty-six".