678666923 has 8 divisors (see below), whose sum is σ = 740950320. Its totient is φ = 616481280.

The previous prime is 678666917. The next prime is 678666931. The reversal of 678666923 is 329666876.

678666923 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-678666923 is a prime.

It is not an unprimeable number, because it can be changed into a prime (678666943) 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, 9518 + ... + 38051.

It is an arithmetic number, because the mean of its divisors is an integer number (92618790).

Almost surely, 2^678666923 is an apocalyptic number.

678666923 is a deficient number, since it is larger than the sum of its proper divisors (62283397).

678666923 is a wasteful number, since it uses less digits than its factorization.

678666923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48877.

The product of its digits is 3919104, while the sum is 53.

The square root of 678666923 is about 26051.2364965658. The cubic root of 678666923 is about 878.7909200324.

The spelling of 678666923 in words is "six hundred seventy-eight million, six hundred sixty-six thousand, nine hundred twenty-three".