6620855108784 has 120 divisors (see below), whose sum is σ = 20053010239488. Its totient is φ = 1876777741440.

The previous prime is 6620855108771. The next prime is 6620855108807. The reversal of 6620855108784 is 4878015580266.

It is a super-2 number, since 2×6620855108784² (a number of 26 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10783932 + ... + 11381339.

Almost surely, 2^{6620855108784} is an apocalyptic number.

It is an amenable number.

6620855108784 is an abundant number, since it is smaller than the sum of its proper divisors (13432155130704).

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

6620855108784 is a wasteful number, since it uses less digits than its factorization.

6620855108784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22165423 (or 22165410 counting only the distinct ones).

The product of its (nonzero) digits is 25804800, while the sum is 60.

The spelling of 6620855108784 in words is "six trillion, six hundred twenty billion, eight hundred fifty-five million, one hundred eight thousand, seven hundred eighty-four".