6689872 has 80 divisors (see below), whose sum is σ = 16070400. Its totient is φ = 2690688.

The previous prime is 6689869. The next prime is 6689873. The reversal of 6689872 is 2789866.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a nialpdrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6689873) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 126198 + ... + 126250.

It is an arithmetic number, because the mean of its divisors is an integer number (200880).

Almost surely, 2^6689872 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 6689872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8035200).

6689872 is an abundant number, since it is smaller than the sum of its proper divisors (9380528).

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

6689872 is a wasteful number, since it uses less digits than its factorization.

6689872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105 (or 85 counting only the distinct ones).

The product of its digits is 290304, while the sum is 46.

The square root of 6689872 is about 2586.4786873276. The cubic root of 6689872 is about 188.4253234443.

The spelling of 6689872 in words is "six million, six hundred eighty-nine thousand, eight hundred seventy-two".