556779 has 4 divisors (see below), whose sum is σ = 742376. Its totient is φ = 371184.

The previous prime is 556769. The next prime is 556781. The reversal of 556779 is 977655.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 556779 - 2⁴ = 556763 is a prime.

It is an Ulam number.

It is a D-number.

It is a Duffinian number.

556779 is a lucky number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (556709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 92794 + ... + 92799.

It is an arithmetic number, because the mean of its divisors is an integer number (185594).

2⁵⁵⁶⁷⁷⁹ is an apocalyptic number.

556779 is a deficient number, since it is larger than the sum of its proper divisors (185597).

556779 is a wasteful number, since it uses less digits than its factorization.

556779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185596.

The product of its digits is 66150, while the sum is 39.

The square root of 556779 is about 746.1762526374. The cubic root of 556779 is about 82.2673703701.

The spelling of 556779 in words is "five hundred fifty-six thousand, seven hundred seventy-nine".