6663880 has 16 divisors (see below), whose sum is σ = 14993820. Its totient is φ = 2665536.

The previous prime is 6663869. The next prime is 6663893. The reversal of 6663880 is 883666.

It can be written as a sum of positive squares in 2 ways, for example, as 6584356 + 79524 = 2566^2 + 282^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83259 + ... + 83338.

Almost surely, 2^6663880 is an apocalyptic number.

It is an amenable number.

6663880 is an abundant number, since it is smaller than the sum of its proper divisors (8329940).

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

6663880 is a wasteful number, since it uses less digits than its factorization.

6663880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166608 (or 166604 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 6663880 is about 2581.4492053883. The cubic root of 6663880 is about 188.1809785842.

The spelling of 6663880 in words is "six million, six hundred sixty-three thousand, eight hundred eighty".