41661805 has 4 divisors (see below), whose sum is σ = 49994172. Its totient is φ = 33329440.

The previous prime is 41661773. The next prime is 41661811. The reversal of 41661805 is 50816614.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17089956 + 24571849 = 4134^2 + 4957^2 .

It is not a de Polignac number, because 41661805 - 2⁵ = 41661773 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4166176 + ... + 4166185.

It is an arithmetic number, because the mean of its divisors is an integer number (12498543).

Almost surely, 2^41661805 is an apocalyptic number.

It is an amenable number.

41661805 is a deficient number, since it is larger than the sum of its proper divisors (8332367).

41661805 is an equidigital number, since it uses as much as digits as its factorization.

41661805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8332366.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 41661805 is about 6454.5956496128. The cubic root of 41661805 is about 346.6671530853.

The spelling of 41661805 in words is "forty-one million, six hundred sixty-one thousand, eight hundred five".