6866869 has 4 divisors (see below), whose sum is σ = 6892480. Its totient is φ = 6841260.

The previous prime is 6866863. The next prime is 6866879. The reversal of 6866869 is 9686686.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9686686 = 2 ⋅4843343.

It is a cyclic number.

It is not a de Polignac number, because 6866869 - 2⁵ = 6866837 is a prime.

It is a super-2 number, since 2×6866869² = 94307779726322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6866863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12399 + ... + 12940.

It is an arithmetic number, because the mean of its divisors is an integer number (1723120).

Almost surely, 2^6866869 is an apocalyptic number.

It is an amenable number.

6866869 is a deficient number, since it is larger than the sum of its proper divisors (25611).

6866869 is a wasteful number, since it uses less digits than its factorization.

6866869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25610.

The product of its digits is 746496, while the sum is 49.

The square root of 6866869 is about 2620.4711408447. The cubic root of 6866869 is about 190.0726315113.

The spelling of 6866869 in words is "six million, eight hundred sixty-six thousand, eight hundred sixty-nine".