6687870 has 32 divisors (see below), whose sum is σ = 18344448. Its totient is φ = 1528608.

The previous prime is 6687869. The next prime is 6687881. The reversal of 6687870 is 787866.

6687870 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15714 + ... + 16133.

It is an arithmetic number, because the mean of its divisors is an integer number (573264).

Almost surely, 2^6687870 is an apocalyptic number.

6687870 is an abundant number, since it is smaller than the sum of its proper divisors (11656578).

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

6687870 is a wasteful number, since it uses less digits than its factorization.

6687870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31864.

The product of its (nonzero) digits is 112896, while the sum is 42.

The square root of 6687870 is about 2586.0916457079. The cubic root of 6687870 is about 188.4065256191.

It can be divided in two parts, 6687 and 870, that added together give a palindrome (7557).

The spelling of 6687870 in words is "six million, six hundred eighty-seven thousand, eight hundred seventy".