6870 has 16 divisors (see below), whose sum is σ = 16560. Its totient is φ = 1824.

The previous prime is 6869. The next prime is 6871. The reversal of 6870 is 786.

It is an interprime number because it is at equal distance from previous prime (6869) and next prime (6871).

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6871) 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, 85 + ... + 144.

It is an arithmetic number, because the mean of its divisors is an integer number (1035).

2⁶⁸⁷⁰ is an apocalyptic number.

6870 is an abundant number, since it is smaller than the sum of its proper divisors (9690).

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

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8280).

6870 is a wasteful number, since it uses less digits than its factorization.

6870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239.

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 6870 is about 82.8854631404. The cubic root of 6870 is about 19.0101515465.

Subtracting from 6870 its reverse (786), we obtain a square (6084 = 78²).

The spelling of 6870 in words is "six thousand, eight hundred seventy".