6620068221 has 32 divisors (see below), whose sum is σ = 9706394880. Its totient is φ = 3988790784.

The previous prime is 6620068207. The next prime is 6620068229. The reversal of 6620068221 is 1228600266.

It is not a de Polignac number, because 6620068221 - 2⁷ = 6620068093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6620068229) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 348255 + ... + 366771.

It is an arithmetic number, because the mean of its divisors is an integer number (303324840).

Almost surely, 2^6620068221 is an apocalyptic number.

It is an amenable number.

6620068221 is a deficient number, since it is larger than the sum of its proper divisors (3086326659).

6620068221 is a wasteful number, since it uses less digits than its factorization.

6620068221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18725.

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 6620068221 is about 81363.8016626559. The cubic root of 6620068221 is about 1877.6767193763.

Adding to 6620068221 its reverse (1228600266), we get a palindrome (7848668487).

It can be divided in two parts, 66200 and 68221, that added together give a triangular number (134421 = T₅₁₈).

The spelling of 6620068221 in words is "six billion, six hundred twenty million, sixty-eight thousand, two hundred twenty-one".