678668379 has 4 divisors (see below), whose sum is σ = 904891176. Its totient is φ = 452445584.

The previous prime is 678668377. The next prime is 678668387. The reversal of 678668379 is 973866876.

678668379 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 678668379 - 2¹ = 678668377 is a prime.

It is not an unprimeable number, because it can be changed into a prime (678668377) 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, 113111394 + ... + 113111399.

It is an arithmetic number, because the mean of its divisors is an integer number (226222794).

Almost surely, 2^678668379 is an apocalyptic number.

678668379 is a deficient number, since it is larger than the sum of its proper divisors (226222797).

678668379 is a wasteful number, since it uses less digits than its factorization.

678668379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226222796.

The product of its digits is 18289152, while the sum is 60.

The square root of 678668379 is about 26051.2644414815. The cubic root of 678668379 is about 878.7915484794.

It can be divided in two parts, 67866 and 8379, that added together give a triangular number (76245 = T₃₉₀).

The spelling of 678668379 in words is "six hundred seventy-eight million, six hundred sixty-eight thousand, three hundred seventy-nine".