6628881 has 16 divisors (see below), whose sum is σ = 10137600. Its totient is φ = 3774288.

The previous prime is 6628879. The next prime is 6628943. The reversal of 6628881 is 1888266.

It is not a de Polignac number, because 6628881 - 2¹ = 6628879 is a prime.

It is a super-2 number, since 2×6628881² = 87884126624322, which contains 22 as substring.

6628881 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (6628781) 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, 9730 + ... + 10388.

It is an arithmetic number, because the mean of its divisors is an integer number (633600).

Almost surely, 2^6628881 is an apocalyptic number.

It is an amenable number.

6628881 is a deficient number, since it is larger than the sum of its proper divisors (3508719).

6628881 is a wasteful number, since it uses less digits than its factorization.

6628881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1148.

The product of its digits is 36864, while the sum is 39.

The square root of 6628881 is about 2574.6613369529. The cubic root of 6628881 is about 187.8509551306.

The spelling of 6628881 in words is "six million, six hundred twenty-eight thousand, eight hundred eighty-one".