6422776601621 has 2 divisors, whose sum is σ = 6422776601622. Its totient is φ = 6422776601620.

The previous prime is 6422776601599. The next prime is 6422776601669. The reversal of 6422776601621 is 1261066772246.

6422776601621 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4148594976100 + 2274181625521 = 2036810^2 + 1508039^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6422776601621 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6422776601621.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6422776601671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3211388300810 + 3211388300811.

It is an arithmetic number, because the mean of its divisors is an integer number (3211388300811).

Almost surely, 2^{6422776601621} is an apocalyptic number.

It is an amenable number.

6422776601621 is a deficient number, since it is larger than the sum of its proper divisors (1).

6422776601621 is an equidigital number, since it uses as much as digits as its factorization.

6422776601621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2032128, while the sum is 50.

The spelling of 6422776601621 in words is "six trillion, four hundred twenty-two billion, seven hundred seventy-six million, six hundred one thousand, six hundred twenty-one".