550555566 has 24 divisors (see below), whose sum is σ = 1210313832. Its totient is φ = 166834800.

The previous prime is 550555547. The next prime is 550555613. The reversal of 550555566 is 665555055.

550555566 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 2×550555566² = 606222862507160712, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 378445 + ... + 379896.

It is an arithmetic number, because the mean of its divisors is an integer number (50429743).

Almost surely, 2^550555566 is an apocalyptic number.

550555566 is an abundant number, since it is smaller than the sum of its proper divisors (659758266).

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

550555566 is a wasteful number, since it uses less digits than its factorization.

550555566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 758368 (or 758357 counting only the distinct ones).

The product of its (nonzero) digits is 562500, while the sum is 42.

The square root of 550555566 is about 23463.9205164013. The cubic root of 550555566 is about 819.5970486991.

The spelling of 550555566 in words is "five hundred fifty million, five hundred fifty-five thousand, five hundred sixty-six".