6627689 has 8 divisors (see below), whose sum is σ = 6885000. Its totient is φ = 6372352.

The previous prime is 6627679. The next prime is 6627697. The reversal of 6627689 is 9867266.

It can be written as a sum of positive squares in 4 ways, for example, as 2301289 + 4326400 = 1517^2 + 2080^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6627689 is a prime.

It is a super-2 number, since 2×6627689² = 87852522961442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6627629) 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, 12767 + ... + 13275.

It is an arithmetic number, because the mean of its divisors is an integer number (860625).

Almost surely, 2^6627689 is an apocalyptic number.

It is an amenable number.

6627689 is a deficient number, since it is larger than the sum of its proper divisors (257311).

6627689 is a wasteful number, since it uses less digits than its factorization.

6627689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 987.

The product of its digits is 217728, while the sum is 44.

The square root of 6627689 is about 2574.4298397898. The cubic root of 6627689 is about 187.8396947202.

The spelling of 6627689 in words is "six million, six hundred twenty-seven thousand, six hundred eighty-nine".