6659968 has 32 divisors (see below), whose sum is σ = 15165360. Its totient is φ = 2853888.

The previous prime is 6659957. The next prime is 6659977. The reversal of 6659968 is 8699566.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×6659968² = 88710347522048, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2821 + ... + 4612.

Almost surely, 2^6659968 is an apocalyptic number.

It is an amenable number.

6659968 is an abundant number, since it is smaller than the sum of its proper divisors (8505392).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6659968 is an equidigital number, since it uses as much as digits as its factorization.

6659968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7454 (or 7442 counting only the distinct ones).

The product of its digits is 699840, while the sum is 49.

The square root of 6659968 is about 2580.6913802313. The cubic root of 6659968 is about 188.1441477845.

The spelling of 6659968 in words is "six million, six hundred fifty-nine thousand, nine hundred sixty-eight".