41605661 has 2 divisors, whose sum is σ = 41605662. Its totient is φ = 41605660.

The previous prime is 41605651. The next prime is 41605747. The reversal of 41605661 is 16650614.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28026436 + 13579225 = 5294^2 + 3685^2 .

It is a cyclic number.

It is not a de Polignac number, because 41605661 - 2¹⁰ = 41604637 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (41605651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20802830 + 20802831.

It is an arithmetic number, because the mean of its divisors is an integer number (20802831).

Almost surely, 2^41605661 is an apocalyptic number.

It is an amenable number.

41605661 is a deficient number, since it is larger than the sum of its proper divisors (1).

41605661 is an equidigital number, since it uses as much as digits as its factorization.

41605661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 41605661 is about 6450.2450341053. The cubic root of 41605661 is about 346.5113586657.

The spelling of 41605661 in words is "forty-one million, six hundred five thousand, six hundred sixty-one".