41665909 has 4 divisors (see below), whose sum is σ = 41688640. Its totient is φ = 41643180.

The previous prime is 41665901. The next prime is 41665931. The reversal of 41665909 is 90956614.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 41665909 - 2³ = 41665901 is a prime.

It is a Duffinian number.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 8349 + ... + 12370.

It is an arithmetic number, because the mean of its divisors is an integer number (10422160).

Almost surely, 2^41665909 is an apocalyptic number.

It is an amenable number.

41665909 is a deficient number, since it is larger than the sum of its proper divisors (22731).

41665909 is a wasteful number, since it uses less digits than its factorization.

41665909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22730.

The product of its (nonzero) digits is 58320, while the sum is 40.

The square root of 41665909 is about 6454.9135548046. The cubic root of 41665909 is about 346.6785358157.

The spelling of 41665909 in words is "forty-one million, six hundred sixty-five thousand, nine hundred nine".