678133679 has 8 divisors (see below), whose sum is σ = 713882592. Its totient is φ = 642906880.

The previous prime is 678133591. The next prime is 678133699. The reversal of 678133679 is 976331876.

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-678133679 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678133699) 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, 127862 + ... + 133059.

It is an arithmetic number, because the mean of its divisors is an integer number (89235324).

Almost surely, 2^678133679 is an apocalyptic number.

678133679 is a deficient number, since it is larger than the sum of its proper divisors (35748913).

678133679 is a wasteful number, since it uses less digits than its factorization.

678133679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261057.

The product of its digits is 1143072, while the sum is 50.

The square root of 678133679 is about 26040.9999615990. Note that the first 4 decimals coincide. The cubic root of 678133679 is about 878.5606977365.

The spelling of 678133679 in words is "six hundred seventy-eight million, one hundred thirty-three thousand, six hundred seventy-nine".