6628663 has 8 divisors (see below), whose sum is σ = 7002800. Its totient is φ = 6257088.

The previous prime is 6628651. The next prime is 6628667. The reversal of 6628663 is 3668266.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6628663 - 2¹⁷ = 6497591 is a prime.

It is a Duffinian number.

6628663 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6628667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7345 + ... + 8197.

It is an arithmetic number, because the mean of its divisors is an integer number (875350).

Almost surely, 2^6628663 is an apocalyptic number.

6628663 is a deficient number, since it is larger than the sum of its proper divisors (374137).

6628663 is a wasteful number, since it uses less digits than its factorization.

6628663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1281.

The product of its digits is 62208, while the sum is 37.

The square root of 6628663 is about 2574.6190009398. The cubic root of 6628663 is about 187.8488958611.

The spelling of 6628663 in words is "six million, six hundred twenty-eight thousand, six hundred sixty-three".