64663 has 2 divisors, whose sum is σ = 64664. Its totient is φ = 64662.

The previous prime is 64661. The next prime is 64667. The reversal of 64663 is 36646.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64663 - 2¹ = 64661 is a prime.

Together with 64661, it forms a pair of twin primes.

It is a d-powerful number, because it can be written as 6 + 4⁶ + 6³ + 6⁴ + 3¹⁰ .

It is a nialpdrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64661) 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 as a sum of consecutive naturals, namely, 32331 + 32332.

It is an arithmetic number, because the mean of its divisors is an integer number (32332).

2⁶⁴⁶⁶³ is an apocalyptic number.

64663 is a deficient number, since it is larger than the sum of its proper divisors (1).

64663 is an equidigital number, since it uses as much as digits as its factorization.

64663 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2592, while the sum is 25.

The square root of 64663 is about 254.2892054335. The cubic root of 64663 is about 40.1376507633.

It can be divided in two parts, 64 and 663, that added together give a palindrome (727).

The spelling of 64663 in words is "sixty-four thousand, six hundred sixty-three".