555669 has 12 divisors (see below), whose sum is σ = 830700. Its totient is φ = 357504.

The previous prime is 555661. The next prime is 555671. The reversal of 555669 is 966555.

555669 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 2 ways, for example, as 213444 + 342225 = 462^2 + 585^2 .

It is not a de Polignac number, because 555669 - 2³ = 555661 is a prime.

It is a super-2 number, since 2×555669² = 617536075122, which contains 22 as substring.

It is a Curzon number.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (555661) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 804 + ... + 1325.

It is an arithmetic number, because the mean of its divisors is an integer number (69225).

2⁵⁵⁵⁶⁶⁹ is an apocalyptic number.

It is an amenable number.

555669 is a deficient number, since it is larger than the sum of its proper divisors (275031).

555669 is a wasteful number, since it uses less digits than its factorization.

555669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2164 (or 2161 counting only the distinct ones).

The product of its digits is 40500, while the sum is 36.

The square root of 555669 is about 745.4320894622. The cubic root of 555669 is about 82.2126643247.

It can be divided in two parts, 5556 and 69, that added together give a square (5625 = 75²).

The spelling of 555669 in words is "five hundred fifty-five thousand, six hundred sixty-nine".