678003403346 has 16 divisors (see below), whose sum is σ = 1078222028184. Its totient is φ = 318647656704.

The previous prime is 678003403309. The next prime is 678003403409. The reversal of 678003403346 is 643304300876.

It can be written as a sum of positive squares in 4 ways, for example, as 332653251121 + 345350152225 = 576761^2 + 587665^2 .

It is a super-2 number, since 2×678003403346² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 678003403297 and 678003403306.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12872345 + ... + 12924908.

Almost surely, 2^678003403346 is an apocalyptic number.

678003403346 is a deficient number, since it is larger than the sum of its proper divisors (400218624838).

678003403346 is a wasteful number, since it uses less digits than its factorization.

678003403346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25798045.

The product of its (nonzero) digits is 870912, while the sum is 44.

The spelling of 678003403346 in words is "six hundred seventy-eight billion, three million, four hundred three thousand, three hundred forty-six".