40663 has 8 divisors (see below), whose sum is σ = 48032. Its totient is φ = 33696.

The previous prime is 40639. The next prime is 40693. The reversal of 40663 is 36604.

It is a happy number.

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 40663 - 2⁹ = 40151 is a prime.

It is a Duffinian number.

It is a plaindrome in base 13.

It is a self number, because there is not a number n which added to its sum of digits gives 40663.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 181 + ... + 337.

It is an arithmetic number, because the mean of its divisors is an integer number (6004).

2⁴⁰⁶⁶³ is an apocalyptic number.

40663 is a deficient number, since it is larger than the sum of its proper divisors (7369).

40663 is a wasteful number, since it uses less digits than its factorization.

40663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 40663 is about 201.6506880722. The cubic root of 40663 is about 34.3874368221.

It can be divided in two parts, 40 and 663, that added together give a triangular number (703 = T₃₇).

The spelling of 40663 in words is "forty thousand, six hundred sixty-three".