6628878 has 80 divisors (see below), whose sum is σ = 16465680. Its totient is φ = 1983744.

The previous prime is 6628877. The next prime is 6628879. The reversal of 6628878 is 8788266.

It is an interprime number because it is at equal distance from previous prime (6628877) and next prime (6628879).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6628877) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 79825 + ... + 79907.

It is an arithmetic number, because the mean of its divisors is an integer number (205821).

Almost surely, 2^6628878 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6628878, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8232840).

6628878 is an abundant number, since it is smaller than the sum of its proper divisors (9836802).

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

6628878 is a wasteful number, since it uses less digits than its factorization.

6628878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143 (or 134 counting only the distinct ones).

The product of its digits is 258048, while the sum is 45.

The square root of 6628878 is about 2574.6607543519. The cubic root of 6628878 is about 187.8509267923.

It can be divided in two parts, 66288 and 78, that added together give a palindrome (66366).

The spelling of 6628878 in words is "six million, six hundred twenty-eight thousand, eight hundred seventy-eight".