6619721322 has 32 divisors (see below), whose sum is σ = 13427710848. Its totient is φ = 2175227136.

The previous prime is 6619721291. The next prime is 6619721323. The reversal of 6619721322 is 2231279166.

It is not an unprimeable number, because it can be changed into a prime (6619721323) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1676883 + ... + 1680825.

It is an arithmetic number, because the mean of its divisors is an integer number (419615964).

Almost surely, 2^6619721322 is an apocalyptic number.

6619721322 is an abundant number, since it is smaller than the sum of its proper divisors (6807989526).

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

6619721322 is a wasteful number, since it uses less digits than its factorization.

6619721322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7854.

The product of its digits is 54432, while the sum is 39.

The square root of 6619721322 is about 81361.6698574949. The cubic root of 6619721322 is about 1877.6439213480.

The spelling of 6619721322 in words is "six billion, six hundred nineteen million, seven hundred twenty-one thousand, three hundred twenty-two".