678204556 has 12 divisors (see below), whose sum is σ = 1227784320. Its totient is φ = 327409040.

The previous prime is 678204551. The next prime is 678204581. The reversal of 678204556 is 655402876.

It is a super-2 number, since 2×678204556² = 919922839558314272, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (678204551) 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, 2923180 + ... + 2923411.

It is an arithmetic number, because the mean of its divisors is an integer number (102315360).

Almost surely, 2^678204556 is an apocalyptic number.

It is an amenable number.

678204556 is a deficient number, since it is larger than the sum of its proper divisors (549579764).

678204556 is a wasteful number, since it uses less digits than its factorization.

678204556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5846624 (or 5846622 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 43.

The square root of 678204556 is about 26042.3607992824. The cubic root of 678204556 is about 878.5913050632.

The spelling of 678204556 in words is "six hundred seventy-eight million, two hundred four thousand, five hundred fifty-six".