6687867 has 8 divisors (see below), whose sum is σ = 9386560. Its totient is φ = 4223880.

The previous prime is 6687853. The next prime is 6687869. The reversal of 6687867 is 7687866.

6687867 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6687867 - 2⁶ = 6687803 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6687869) 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, 58609 + ... + 58722.

It is an arithmetic number, because the mean of its divisors is an integer number (1173320).

Almost surely, 2^6687867 is an apocalyptic number.

6687867 is a deficient number, since it is larger than the sum of its proper divisors (2698693).

6687867 is a wasteful number, since it uses less digits than its factorization.

6687867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117353.

The product of its digits is 677376, while the sum is 48.

The square root of 6687867 is about 2586.0910656819. The cubic root of 6687867 is about 188.4064974477.

Subtracting 6687867 from its reverse (7687866), we obtain a palindrome (999999).

The spelling of 6687867 in words is "six million, six hundred eighty-seven thousand, eight hundred sixty-seven".