6620717 has 2 divisors, whose sum is σ = 6620718. Its totient is φ = 6620716.

The previous prime is 6620699. The next prime is 6620741. The reversal of 6620717 is 7170266.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5134756 + 1485961 = 2266^2 + 1219^2 .

It is a cyclic number.

It is not a de Polignac number, because 6620717 - 2⁸ = 6620461 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6620717.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6620777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3310358 + 3310359.

It is an arithmetic number, because the mean of its divisors is an integer number (3310359).

Almost surely, 2^6620717 is an apocalyptic number.

It is an amenable number.

6620717 is a deficient number, since it is larger than the sum of its proper divisors (1).

6620717 is an equidigital number, since it uses as much as digits as its factorization.

6620717 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3528, while the sum is 29.

The square root of 6620717 is about 2573.0753972630. The cubic root of 6620717 is about 187.7738055976.

It can be divided in two parts, 6620 and 717, that added together give a palindrome (7337).

The spelling of 6620717 in words is "six million, six hundred twenty thousand, seven hundred seventeen".