550641666 has 16 divisors (see below), whose sum is σ = 1149165504. Its totient is φ = 175566864.

The previous prime is 550641661. The next prime is 550641667. The reversal of 550641666 is 666146055.

It is not an unprimeable number, because it can be changed into a prime (550641661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1994941 + ... + 1995216.

It is an arithmetic number, because the mean of its divisors is an integer number (71822844).

Almost surely, 2^550641666 is an apocalyptic number.

550641666 is an abundant number, since it is smaller than the sum of its proper divisors (598523838).

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

550641666 is a wasteful number, since it uses less digits than its factorization.

550641666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3990185.

The product of its (nonzero) digits is 129600, while the sum is 39.

The square root of 550641666 is about 23465.7551764268. The cubic root of 550641666 is about 819.6397713790.

The spelling of 550641666 in words is "five hundred fifty million, six hundred forty-one thousand, six hundred sixty-six".