6642980 has 48 divisors (see below), whose sum is σ = 14708736. Its totient is φ = 2517120.

The previous prime is 6642919. The next prime is 6642991. The reversal of 6642980 is 892466.

It is a self number, because there is not a number n which added to its sum of digits gives 6642980.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 34685 + ... + 34875.

It is an arithmetic number, because the mean of its divisors is an integer number (306432).

Almost surely, 2^6642980 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 6642980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7354368).

6642980 is an abundant number, since it is smaller than the sum of its proper divisors (8065756).

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

6642980 is a wasteful number, since it uses less digits than its factorization.

6642980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284 (or 282 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 6642980 is about 2577.3979126243. The cubic root of 6642980 is about 187.9840411985.

The spelling of 6642980 in words is "six million, six hundred forty-two thousand, nine hundred eighty".