6647980 has 12 divisors (see below), whose sum is σ = 13960800. Its totient is φ = 2659184.

The previous prime is 6647959. The next prime is 6647983. The reversal of 6647980 is 897466.

It is not an unprimeable number, because it can be changed into a prime (6647983) by changing a digit.

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, 166180 + ... + 166219.

It is an arithmetic number, because the mean of its divisors is an integer number (1163400).

Almost surely, 2^6647980 is an apocalyptic number.

It is an amenable number.

6647980 is an abundant number, since it is smaller than the sum of its proper divisors (7312820).

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

6647980 is a wasteful number, since it uses less digits than its factorization.

6647980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332408 (or 332406 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 6647980 is about 2578.3677006975. The cubic root of 6647980 is about 188.0311929530.

The spelling of 6647980 in words is "six million, six hundred forty-seven thousand, nine hundred eighty".