556678656 has 200 divisors, whose sum is σ = 1719098304. Its totient is φ = 179159040.

The previous prime is 556678631. The next prime is 556678657. The reversal of 556678656 is 656876655.

556678656 is a `hidden beast` number, since 5 + 566 + 78 + 6 + 5 + 6 = 666.

It is a super-2 number, since 2×556678656² = 619782252091932672, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (556678657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1285416 + ... + 1285848.

Almost surely, 2^556678656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 556678656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (859549152).

556678656 is an abundant number, since it is smaller than the sum of its proper divisors (1162419648).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

556678656 is an equidigital number, since it uses as much as digits as its factorization.

556678656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 494 (or 469 counting only the distinct ones).

The product of its digits is 9072000, while the sum is 54.

The square root of 556678656 is about 23594.0385690962. The cubic root of 556678656 is about 822.6242793454.

The spelling of 556678656 in words is "five hundred fifty-six million, six hundred seventy-eight thousand, six hundred fifty-six".