41663561 has 8 divisors (see below), whose sum is σ = 44138880. Its totient is φ = 39216528.

The previous prime is 41663521. The next prime is 41663563. The reversal of 41663561 is 16536614.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 41663561 - 2⁶ = 41663497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (41663563) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4001 + ... + 9966.

It is an arithmetic number, because the mean of its divisors is an integer number (5517360).

Almost surely, 2^41663561 is an apocalyptic number.

It is an amenable number.

41663561 is a deficient number, since it is larger than the sum of its proper divisors (2475319).

41663561 is a wasteful number, since it uses less digits than its factorization.

41663561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14143.

The product of its digits is 12960, while the sum is 32.

The square root of 41663561 is about 6454.7316752906. The cubic root of 41663561 is about 346.6720235653.

It can be divided in two parts, 41663 and 561, that added together give a palindrome (42224).

The spelling of 41663561 in words is "forty-one million, six hundred sixty-three thousand, five hundred sixty-one".