65622222656 has 112 divisors (see below), whose sum is σ = 138933204480. Its totient is φ = 30696960000.

The previous prime is 65622222593. The next prime is 65622222671.

65622222656 is nontrivially palindromic in base 10.

65622222656 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×65622222656² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

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, 11487641 + ... + 11493351.

It is an arithmetic number, because the mean of its divisors is an integer number (1240475040).

Almost surely, 2^65622222656 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 65622222656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69466602240).

65622222656 is an abundant number, since it is smaller than the sum of its proper divisors (73310981824).

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

65622222656 is a wasteful number, since it uses less digits than its factorization.

65622222656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5944 (or 5934 counting only the distinct ones).

The product of its digits is 1036800, while the sum is 44.

The spelling of 65622222656 in words is "sixty-five billion, six hundred twenty-two million, two hundred twenty-two thousand, six hundred fifty-six".