220660606644 has 48 divisors (see below), whose sum is σ = 539371257600. Its totient is φ = 70118246016.

The previous prime is 220660606643. The next prime is 220660606687. The reversal of 220660606644 is 446606066022.

It is a super-2 number, since 2×220660606644² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 220660606596 and 220660606605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220660606643) 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, 3985687 + ... + 4040670.

It is an arithmetic number, because the mean of its divisors is an integer number (11236901200).

Almost surely, 2^220660606644 is an apocalyptic number.

It is an amenable number.

220660606644 is an abundant number, since it is smaller than the sum of its proper divisors (318710650956).

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

220660606644 is a wasteful number, since it uses less digits than its factorization.

220660606644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8026472 (or 8026470 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 42.

The spelling of 220660606644 in words is "two hundred twenty billion, six hundred sixty million, six hundred six thousand, six hundred forty-four".