6620050621 has 2 divisors, whose sum is σ = 6620050622. Its totient is φ = 6620050620.

The previous prime is 6620050607. The next prime is 6620050639. The reversal of 6620050621 is 1260500266.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6441828121 + 178222500 = 80261^2 + 13350^2 .

It is a cyclic number.

It is not a de Polignac number, because 6620050621 - 2²¹ = 6617953469 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6620050621.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6620050321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3310025310 + 3310025311.

It is an arithmetic number, because the mean of its divisors is an integer number (3310025311).

Almost surely, 2^6620050621 is an apocalyptic number.

It is an amenable number.

6620050621 is a deficient number, since it is larger than the sum of its proper divisors (1).

6620050621 is an equidigital number, since it uses as much as digits as its factorization.

6620050621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 6620050621 is about 81363.6935063791. The cubic root of 6620050621 is about 1877.6750553884.

Adding to 6620050621 its reverse (1260500266), we get a palindrome (7880550887).

The spelling of 6620050621 in words is "six billion, six hundred twenty million, fifty thousand, six hundred twenty-one".