6840866 has 4 divisors (see below), whose sum is σ = 10261302. Its totient is φ = 3420432.

The previous prime is 6840857. The next prime is 6840871. The reversal of 6840866 is 6680486.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 3690241 + 3150625 = 1921^2 + 1775^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1710215 + ... + 1710218.

Almost surely, 2^6840866 is an apocalyptic number.

6840866 is a deficient number, since it is larger than the sum of its proper divisors (3420436).

6840866 is a wasteful number, since it uses less digits than its factorization.

6840866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3420435.

The product of its (nonzero) digits is 55296, while the sum is 38.

The square root of 6840866 is about 2615.5049225723. The cubic root of 6840866 is about 189.8324099302.

The spelling of 6840866 in words is "six million, eight hundred forty thousand, eight hundred sixty-six".