78663 has 8 divisors (see below), whose sum is σ = 113008. Its totient is φ = 48384.

The previous prime is 78653. The next prime is 78691. The reversal of 78663 is 36687.

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

It is not a de Polignac number, because 78663 - 2¹² = 74567 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 78663.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78623) 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, 970 + ... + 1047.

It is an arithmetic number, because the mean of its divisors is an integer number (14126).

2⁷⁸⁶⁶³ is an apocalyptic number.

78663 is a deficient number, since it is larger than the sum of its proper divisors (34345).

78663 is a wasteful number, since it uses less digits than its factorization.

78663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2033.

The product of its digits is 6048, while the sum is 30.

The square root of 78663 is about 280.4692496514. The cubic root of 78663 is about 42.8473040907.

It can be divided in two parts, 78 and 663, that added together give a triangular number (741 = T₃₈).

The spelling of 78663 in words is "seventy-eight thousand, six hundred sixty-three".