6647646 has 16 divisors (see below), whose sum is σ = 14077584. Its totient is φ = 2085504.

The previous prime is 6647623. The next prime is 6647647. The reversal of 6647646 is 6467466.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6647647) 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, 32485 + ... + 32688.

It is an arithmetic number, because the mean of its divisors is an integer number (879849).

Almost surely, 2^6647646 is an apocalyptic number.

6647646 is an abundant number, since it is smaller than the sum of its proper divisors (7429938).

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

6647646 is a wasteful number, since it uses less digits than its factorization.

6647646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65195.

The product of its digits is 145152, while the sum is 39.

The square root of 6647646 is about 2578.3029302237. The cubic root of 6647646 is about 188.0280439529.

The spelling of 6647646 in words is "six million, six hundred forty-seven thousand, six hundred forty-six".