41665905 has 24 divisors (see below), whose sum is σ = 72432360. Its totient is φ = 22156800.

The previous prime is 41665901. The next prime is 41665931. The reversal of 41665905 is 50956614.

41665905 is a `hidden beast` number, since 4 + 1 + 66 + 590 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 23415921 + 18249984 = 4839^2 + 4272^2 .

It is not a de Polignac number, because 41665905 - 2² = 41665901 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 41665905.

It is not an unprimeable number, because it can be changed into a prime (41665901) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16891 + ... + 19199.

It is an arithmetic number, because the mean of its divisors is an integer number (3018015).

Almost surely, 2^41665905 is an apocalyptic number.

41665905 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

41665905 is a deficient number, since it is larger than the sum of its proper divisors (30766455).

41665905 is a wasteful number, since it uses less digits than its factorization.

41665905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2721 (or 2718 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 41665905 is about 6454.9132449631. The cubic root of 41665905 is about 346.6785247218.

The spelling of 41665905 in words is "forty-one million, six hundred sixty-five thousand, nine hundred five".