678767663 has 4 divisors (see below), whose sum is σ = 775734480. Its totient is φ = 581800848.

The previous prime is 678767633. The next prime is 678767689. The reversal of 678767663 is 366767876.

678767663 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 678767663 - 2⁸ = 678767407 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 678767599 and 678767608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678767603) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48483398 + ... + 48483411.

It is an arithmetic number, because the mean of its divisors is an integer number (193933620).

Almost surely, 2^678767663 is an apocalyptic number.

678767663 is a deficient number, since it is larger than the sum of its proper divisors (96966817).

678767663 is an equidigital number, since it uses as much as digits as its factorization.

678767663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96966816.

The product of its digits is 10668672, while the sum is 56.

The square root of 678767663 is about 26053.1699222954. The cubic root of 678767663 is about 878.8343998869.

The spelling of 678767663 in words is "six hundred seventy-eight million, seven hundred sixty-seven thousand, six hundred sixty-three".