6689445 has 16 divisors (see below), whose sum is σ = 12232320. Its totient is φ = 3057984.

The previous prime is 6689429. The next prime is 6689491. The reversal of 6689445 is 5449866.

6689445 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 6689445 - 2⁴ = 6689429 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6689397 and 6689406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31750 + ... + 31959.

It is an arithmetic number, because the mean of its divisors is an integer number (764520).

Almost surely, 2^6689445 is an apocalyptic number.

It is an amenable number.

6689445 is a deficient number, since it is larger than the sum of its proper divisors (5542875).

6689445 is a wasteful number, since it uses less digits than its factorization.

6689445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63724.

The product of its digits is 207360, while the sum is 42.

The square root of 6689445 is about 2586.3961413519. The cubic root of 6689445 is about 188.4213144326.

The spelling of 6689445 in words is "six million, six hundred eighty-nine thousand, four hundred forty-five".