41663541665 has 16 divisors (see below), whose sum is σ = 51955430400. Its totient is φ = 32039146560.

The previous prime is 41663541649. The next prime is 41663541671. The reversal of 41663541665 is 56614536614.

41663541665 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 41663541665 - 2⁴ = 41663541649 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 878909 + ... + 925098.

It is an arithmetic number, because the mean of its divisors is an integer number (3247214400).

Almost surely, 2^41663541665 is an apocalyptic number.

It is an amenable number.

41663541665 is a deficient number, since it is larger than the sum of its proper divisors (10291888735).

41663541665 is a wasteful number, since it uses less digits than its factorization.

41663541665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1804192.

The product of its digits is 1555200, while the sum is 47.

The spelling of 41663541665 in words is "forty-one billion, six hundred sixty-three million, five hundred forty-one thousand, six hundred sixty-five".