555668 has 6 divisors (see below), whose sum is σ = 972426. Its totient is φ = 277832.

The previous prime is 555661. The next prime is 555671. The reversal of 555668 is 866555.

It can be written as a sum of positive squares in only one way, i.e., 327184 + 228484 = 572^2 + 478^2 .

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 as a sum of consecutive naturals, namely, 69455 + ... + 69462.

It is an arithmetic number, because the mean of its divisors is an integer number (162071).

2⁵⁵⁵⁶⁶⁸ is an apocalyptic number.

It is an amenable number.

555668 is a deficient number, since it is larger than the sum of its proper divisors (416758).

555668 is a wasteful number, since it uses less digits than its factorization.

555668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138921 (or 138919 counting only the distinct ones).

The product of its digits is 36000, while the sum is 35.

The square root of 555668 is about 745.4314187100. The cubic root of 555668 is about 82.2126150071.

The spelling of 555668 in words is "five hundred fifty-five thousand, six hundred sixty-eight".