556778 has 8 divisors (see below), whose sum is σ = 840672. Its totient is φ = 276556.

The previous prime is 556769. The next prime is 556781. The reversal of 556778 is 877655.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a plaindrome in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 500 + ... + 1167.

It is an arithmetic number, because the mean of its divisors is an integer number (105084).

2⁵⁵⁶⁷⁷⁸ is an apocalyptic number.

556778 is a deficient number, since it is larger than the sum of its proper divisors (283894).

556778 is a wasteful number, since it uses less digits than its factorization.

556778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1836.

The product of its digits is 58800, while the sum is 38.

The square root of 556778 is about 746.1755825541. The cubic root of 556778 is about 82.2673211181.

The spelling of 556778 in words is "five hundred fifty-six thousand, seven hundred seventy-eight".