6667128 has 96 divisors (see below), whose sum is σ = 20638800. Its totient is φ = 1926144.

The previous prime is 6667127. The next prime is 6667147. The reversal of 6667128 is 8217666.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 6667092 and 6667101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6667127) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15703 + ... + 16121.

Almost surely, 2^6667128 is an apocalyptic number.

6667128 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6667128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10319400).

6667128 is an abundant number, since it is smaller than the sum of its proper divisors (13971672).

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

6667128 is a wasteful number, since it uses less digits than its factorization.

6667128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 461 (or 454 counting only the distinct ones).

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

The square root of 6667128 is about 2582.0782327420. The cubic root of 6667128 is about 188.2115469889.

The spelling of 6667128 in words is "six million, six hundred sixty-seven thousand, one hundred twenty-eight".