550803665 has 8 divisors (see below), whose sum is σ = 664390248. Its totient is φ = 438359040.

The previous prime is 550803653. The next prime is 550803679. The reversal of 550803665 is 566308055.

It can be written as a sum of positive squares in 4 ways, for example, as 107827456 + 442976209 = 10384^2 + 21047^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 550803665 - 2¹⁸ = 550541521 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 284426 + ... + 286355.

It is an arithmetic number, because the mean of its divisors is an integer number (83048781).

Almost surely, 2^550803665 is an apocalyptic number.

It is an amenable number.

550803665 is a deficient number, since it is larger than the sum of its proper divisors (113586583).

550803665 is a wasteful number, since it uses less digits than its factorization.

550803665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 570979.

The product of its (nonzero) digits is 108000, while the sum is 38.

The square root of 550803665 is about 23469.2067398964. The cubic root of 550803665 is about 819.7201429480.

The spelling of 550803665 in words is "five hundred fifty million, eight hundred three thousand, six hundred sixty-five".