5206661 has 2 divisors, whose sum is σ = 5206662. Its totient is φ = 5206660.

The previous prime is 5206657. The next prime is 5206679. The reversal of 5206661 is 1666025.

5206661 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., 4950625 + 256036 = 2225^2 + 506^2 .

It is a cyclic number.

It is not a de Polignac number, because 5206661 - 2² = 5206657 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 5206661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5206681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2603330 + 2603331.

It is an arithmetic number, because the mean of its divisors is an integer number (2603331).

Almost surely, 2^5206661 is an apocalyptic number.

It is an amenable number.

5206661 is a deficient number, since it is larger than the sum of its proper divisors (1).

5206661 is an equidigital number, since it uses as much as digits as its factorization.

5206661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 5206661 is about 2281.8109036465. The cubic root of 5206661 is about 173.3217641029.

The spelling of 5206661 in words is "five million, two hundred six thousand, six hundred sixty-one".