5685661 has 2 divisors, whose sum is σ = 5685662. Its totient is φ = 5685660.

The previous prime is 5685649. The next prime is 5685677. The reversal of 5685661 is 1665865.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3980025 + 1705636 = 1995^2 + 1306^2 .

It is a cyclic number.

It is not a de Polignac number, because 5685661 - 2⁹ = 5685149 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 5685661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5685601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2842830 + 2842831.

It is an arithmetic number, because the mean of its divisors is an integer number (2842831).

Almost surely, 2^5685661 is an apocalyptic number.

It is an amenable number.

5685661 is a deficient number, since it is larger than the sum of its proper divisors (1).

5685661 is an equidigital number, since it uses as much as digits as its factorization.

5685661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 43200, while the sum is 37.

The square root of 5685661 is about 2384.4624132076. The cubic root of 5685661 is about 178.4816836052.

The spelling of 5685661 in words is "five million, six hundred eighty-five thousand, six hundred sixty-one".