6866172 has 36 divisors (see below), whose sum is σ = 17559360. Its totient is φ = 2261952.

The previous prime is 6866149. The next prime is 6866173. The reversal of 6866172 is 2716686.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6866173) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2133 + ... + 4275.

It is an arithmetic number, because the mean of its divisors is an integer number (487760).

Almost surely, 2^6866172 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6866172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8779680).

6866172 is an abundant number, since it is smaller than the sum of its proper divisors (10693188).

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

6866172 is a wasteful number, since it uses less digits than its factorization.

6866172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2242 (or 2237 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 6866172 is about 2620.3381461178. The cubic root of 6866172 is about 190.0662003849.

The spelling of 6866172 in words is "six million, eight hundred sixty-six thousand, one hundred seventy-two".