676821556 has 6 divisors (see below), whose sum is σ = 1184437730. Its totient is φ = 338410776.

The previous prime is 676821539. The next prime is 676821571. The reversal of 676821556 is 655128676.

676821556 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 619213456 + 57608100 = 24884^2 + 7590^2 .

It is a super-2 number, since 2×676821556² = 916174837332522272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84602691 + ... + 84602698.

Almost surely, 2^676821556 is an apocalyptic number.

It is an amenable number.

676821556 is a deficient number, since it is larger than the sum of its proper divisors (507616174).

676821556 is a wasteful number, since it uses less digits than its factorization.

676821556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169205393 (or 169205391 counting only the distinct ones).

The product of its digits is 604800, while the sum is 46.

The square root of 676821556 is about 26015.7943565058. The cubic root of 676821556 is about 877.9936885857.

The spelling of 676821556 in words is "six hundred seventy-six million, eight hundred twenty-one thousand, five hundred fifty-six".