6622820417957 has 2 divisors, whose sum is σ = 6622820417958. Its totient is φ = 6622820417956.

The previous prime is 6622820417933. The next prime is 6622820417959. The reversal of 6622820417957 is 7597140282266.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4225692811201 + 2397127606756 = 2055649^2 + 1548266^2 .

It is a cyclic number.

It is not a de Polignac number, because 6622820417957 - 2⁸ = 6622820417701 is a prime.

Together with 6622820417959, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 6622820417896 and 6622820417905.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6622820417959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3311410208978 + 3311410208979.

It is an arithmetic number, because the mean of its divisors is an integer number (3311410208979).

Almost surely, 2^{6622820417957} is an apocalyptic number.

It is an amenable number.

6622820417957 is a deficient number, since it is larger than the sum of its proper divisors (1).

6622820417957 is an equidigital number, since it uses as much as digits as its factorization.

6622820417957 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20321280, while the sum is 59.

The spelling of 6622820417957 in words is "six trillion, six hundred twenty-two billion, eight hundred twenty million, four hundred seventeen thousand, nine hundred fifty-seven".