6620057 has 2 divisors, whose sum is σ = 6620058. Its totient is φ = 6620056.

The previous prime is 6620039. The next prime is 6620059. The reversal of 6620057 is 7500266.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5494336 + 1125721 = 2344^2 + 1061^2 .

It is a cyclic number.

It is not a de Polignac number, because 6620057 - 2¹⁶ = 6554521 is a prime.

Together with 6620059, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (6620059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3310028 + 3310029.

It is an arithmetic number, because the mean of its divisors is an integer number (3310029).

Almost surely, 2^6620057 is an apocalyptic number.

It is an amenable number.

6620057 is a deficient number, since it is larger than the sum of its proper divisors (1).

6620057 is an equidigital number, since it uses as much as digits as its factorization.

6620057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 6620057 is about 2572.9471428694. The cubic root of 6620057 is about 187.7675658490.

The spelling of 6620057 in words is "six million, six hundred twenty thousand, fifty-seven".