550631666 has 64 divisors (see below), whose sum is σ = 999734400. Its totient is φ = 224695296.

The previous prime is 550631651. The next prime is 550631747. The reversal of 550631666 is 666136055.

550631666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1452665 + ... + 1453043.

It is an arithmetic number, because the mean of its divisors is an integer number (15620850).

Almost surely, 2^550631666 is an apocalyptic number.

550631666 is a deficient number, since it is larger than the sum of its proper divisors (449102734).

550631666 is a wasteful number, since it uses less digits than its factorization.

550631666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 603.

The product of its (nonzero) digits is 97200, while the sum is 38.

The square root of 550631666 is about 23465.5420990013. The cubic root of 550631666 is about 819.6348096239.

The spelling of 550631666 in words is "five hundred fifty million, six hundred thirty-one thousand, six hundred sixty-six".