550211665 has 4 divisors (see below), whose sum is σ = 660254004. Its totient is φ = 440169328.

The previous prime is 550211663. The next prime is 550211707. The reversal of 550211665 is 566112055.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 566112055 = 5 ⋅113222411.

It can be written as a sum of positive squares in 2 ways, for example, as 301960129 + 248251536 = 17377^2 + 15756^2 .

It is a cyclic number.

It is not a de Polignac number, because 550211665 - 2¹ = 550211663 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (550211663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55021162 + ... + 55021171.

It is an arithmetic number, because the mean of its divisors is an integer number (165063501).

Almost surely, 2^550211665 is an apocalyptic number.

It is an amenable number.

550211665 is a deficient number, since it is larger than the sum of its proper divisors (110042339).

550211665 is a wasteful number, since it uses less digits than its factorization.

550211665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110042338.

The product of its (nonzero) digits is 9000, while the sum is 31.

The square root of 550211665 is about 23456.5910779891. The cubic root of 550211665 is about 819.4263611429.

The spelling of 550211665 in words is "five hundred fifty million, two hundred eleven thousand, six hundred sixty-five".