6615980 has 72 divisors (see below), whose sum is σ = 16643088. Its totient is φ = 2201472.

The previous prime is 6615979. The next prime is 6616003. The reversal of 6615980 is 895166.

6615980 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a nialpdrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 6615980.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 42062 + ... + 42218.

It is an arithmetic number, because the mean of its divisors is an integer number (231154).

Almost surely, 2^6615980 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6615980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8321544).

6615980 is an abundant number, since it is smaller than the sum of its proper divisors (10027108).

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

6615980 is a wasteful number, since it uses less digits than its factorization.

6615980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223 (or 214 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 6615980 is about 2572.1547387356. The cubic root of 6615980 is about 187.7290120233.

The spelling of 6615980 in words is "six million, six hundred fifteen thousand, nine hundred eighty".