6619660 has 12 divisors (see below), whose sum is σ = 13901328. Its totient is φ = 2647856.

The previous prime is 6619651. The next prime is 6619673. The reversal of 6619660 is 669166.

It is a happy number.

It is a super-3 number, since 3×6619660³ (a number of 21 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 165472 + ... + 165511.

It is an arithmetic number, because the mean of its divisors is an integer number (1158444).

Almost surely, 2^6619660 is an apocalyptic number.

It is an amenable number.

6619660 is an abundant number, since it is smaller than the sum of its proper divisors (7281668).

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

6619660 is a wasteful number, since it uses less digits than its factorization.

6619660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330992 (or 330990 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 6619660 is about 2572.8699928290. The cubic root of 6619660 is about 187.7638123459.

The spelling of 6619660 in words is "six million, six hundred nineteen thousand, six hundred sixty".