555556668 has 24 divisors (see below), whose sum is σ = 1372552272. Its totient is φ = 174292224.

The previous prime is 555556663. The next prime is 555556691. The reversal of 555556668 is 866655555.

555556668 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×555556668² = 617286422718524448, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a plaindrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 555556668.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (555556663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1361455 + ... + 1361862.

It is an arithmetic number, because the mean of its divisors is an integer number (57189678).

Almost surely, 2^555556668 is an apocalyptic number.

It is an amenable number.

555556668 is an abundant number, since it is smaller than the sum of its proper divisors (816995604).

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

555556668 is a wasteful number, since it uses less digits than its factorization.

555556668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2723341 (or 2723339 counting only the distinct ones).

The product of its digits is 5400000, while the sum is 51.

The square root of 555556668 is about 23570.2496380501. The cubic root of 555556668 is about 822.0712401479.

The spelling of 555556668 in words is "five hundred fifty-five million, five hundred fifty-six thousand, six hundred sixty-eight".