6669944 has 16 divisors (see below), whose sum is σ = 12742920. Its totient is φ = 3271840.

The previous prime is 6669907. The next prime is 6669947. The reversal of 6669944 is 4499666.

It is a happy number.

It is a zygodrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 6669895 and 6669904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6669947) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7442 + ... + 8289.

Almost surely, 2^6669944 is an apocalyptic number.

It is an amenable number.

6669944 is a deficient number, since it is larger than the sum of its proper divisors (6072976).

6669944 is a wasteful number, since it uses less digits than its factorization.

6669944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15790 (or 15786 counting only the distinct ones).

The product of its digits is 279936, while the sum is 44.

The square root of 6669944 is about 2582.6234723629. The cubic root of 6669944 is about 188.2380416112.

The spelling of 6669944 in words is "six million, six hundred sixty-nine thousand, nine hundred forty-four".