7220716672 has 64 divisors (see below), whose sum is σ = 15665945400. Its totient is φ = 3295125504.

The previous prime is 7220716667. The next prime is 7220716673. The reversal of 7220716672 is 2766170227.

It can be written as a sum of positive squares in 4 ways, for example, as 2578202176 + 4642514496 = 50776^2 + 68136^2 .

It is a tau number, because it is divible by the number of its divisors (64).

It is not an unprimeable number, because it can be changed into a prime (7220716673) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 123718 + ... + 172474.

Almost surely, 2^7220716672 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 7220716672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7832972700).

7220716672 is an abundant number, since it is smaller than the sum of its proper divisors (8445228728).

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

7220716672 is a wasteful number, since it uses less digits than its factorization.

7220716672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48873 (or 48861 counting only the distinct ones).

The product of its (nonzero) digits is 98784, while the sum is 40.

The square root of 7220716672 is about 84974.8002174762. The cubic root of 7220716672 is about 1932.8290075212.

Adding to 7220716672 its reverse (2766170227), we get a palindrome (9986886899).

The spelling of 7220716672 in words is "seven billion, two hundred twenty million, seven hundred sixteen thousand, six hundred seventy-two".