5220661 has 2 divisors, whose sum is σ = 5220662. Its totient is φ = 5220660.

The previous prime is 5220647. The next prime is 5220689. The reversal of 5220661 is 1660225.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3218436 + 2002225 = 1794^2 + 1415^2 .

It is a cyclic number.

It is not a de Polignac number, because 5220661 - 2⁷ = 5220533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5220601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2610330 + 2610331.

It is an arithmetic number, because the mean of its divisors is an integer number (2610331).

Almost surely, 2^5220661 is an apocalyptic number.

It is an amenable number.

5220661 is a deficient number, since it is larger than the sum of its proper divisors (1).

5220661 is an equidigital number, since it uses as much as digits as its factorization.

5220661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 5220661 is about 2284.8765831003. The cubic root of 5220661 is about 173.4769712561.

Adding to 5220661 its reverse (1660225), we get a palindrome (6880886).

The spelling of 5220661 in words is "five million, two hundred twenty thousand, six hundred sixty-one".