41663501221 has 4 divisors (see below), whose sum is σ = 41709437632. Its totient is φ = 41617564812.

The previous prime is 41663501161. The next prime is 41663501249. The reversal of 41663501221 is 12210536614.

It is a happy number.

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 41663501221 - 2¹⁷ = 41663370149 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 (41663501261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22966845 + ... + 22968658.

It is an arithmetic number, because the mean of its divisors is an integer number (10427359408).

Almost surely, 2^41663501221 is an apocalyptic number.

It is an amenable number.

41663501221 is a deficient number, since it is larger than the sum of its proper divisors (45936411).

41663501221 is an equidigital number, since it uses as much as digits as its factorization.

41663501221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45936410.

The product of its (nonzero) digits is 8640, while the sum is 31.

The spelling of 41663501221 in words is "forty-one billion, six hundred sixty-three million, five hundred one thousand, two hundred twenty-one".