662643222656 has 128 divisors (see below), whose sum is σ = 1381205468160. Its totient is φ = 316365557760.

The previous prime is 662643222643. The next prime is 662643222697. The reversal of 662643222656 is 656222346266.

It is a tau number, because it is divible by the number of its divisors (128).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74980670 + ... + 74989506.

It is an arithmetic number, because the mean of its divisors is an integer number (10790667720).

Almost surely, 2^662643222656 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 662643222656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (690602734080).

662643222656 is an abundant number, since it is smaller than the sum of its proper divisors (718562245504).

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

662643222656 is a wasteful number, since it uses less digits than its factorization.

662643222656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9182 (or 9170 counting only the distinct ones).

The product of its digits is 7464960, while the sum is 50.

The spelling of 662643222656 in words is "six hundred sixty-two billion, six hundred forty-three million, two hundred twenty-two thousand, six hundred fifty-six".