78480716663 has 4 divisors (see below), whose sum is σ = 78517895808. Its totient is φ = 78443537520.

The previous prime is 78480716623. The next prime is 78480716683. The reversal of 78480716663 is 36661708487.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36661708487 = 523 ⋅70098869.

It is a cyclic number.

It is not a de Polignac number, because 78480716663 - 2¹⁶ = 78480651127 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78480716599 and 78480716608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78480716623) 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, 18586406 + ... + 18590627.

It is an arithmetic number, because the mean of its divisors is an integer number (19629473952).

Almost surely, 2^78480716663 is an apocalyptic number.

78480716663 is a deficient number, since it is larger than the sum of its proper divisors (37179145).

78480716663 is a wasteful number, since it uses less digits than its factorization.

78480716663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37179144.

The product of its (nonzero) digits is 8128512, while the sum is 56.

The spelling of 78480716663 in words is "seventy-eight billion, four hundred eighty million, seven hundred sixteen thousand, six hundred sixty-three".