6619968 has 70 divisors (see below), whose sum is σ = 19639026. Its totient is φ = 2204928.

The previous prime is 6619967. The next prime is 6619981. The reversal of 6619968 is 8699166.

It can be written as a sum of positive squares in only one way, i.e., 5992704 + 627264 = 2448^2 + 792^2 .

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6619967) by changing a digit.

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 9 ways as a sum of consecutive naturals, for example, 4546 + ... + 5822.

Almost surely, 2^6619968 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 6619968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9819513).

6619968 is an abundant number, since it is smaller than the sum of its proper divisors (13019058).

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

6619968 is a wasteful number, since it uses less digits than its factorization.

6619968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1301 (or 1282 counting only the distinct ones).

The product of its digits is 139968, while the sum is 45.

The square root of 6619968 is about 2572.9298474696. The cubic root of 6619968 is about 187.7667243966.

The spelling of 6619968 in words is "six million, six hundred nineteen thousand, nine hundred sixty-eight".