550031165665 has 4 divisors (see below), whose sum is σ = 660037398804. Its totient is φ = 440024932528.

The previous prime is 550031165609. The next prime is 550031165681. The reversal of 550031165665 is 566561130055.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 343922429601 + 206108736064 = 586449^2 + 453992^2 .

It is a cyclic number.

It is not a de Polignac number, because 550031165665 - 2³³ = 541441231073 is a prime.

It is a super-3 number, since 3×550031165665³ (a number of 36 digits) contains 333 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55003116562 + ... + 55003116571.

It is an arithmetic number, because the mean of its divisors is an integer number (165009349701).

Almost surely, 2^550031165665 is an apocalyptic number.

It is an amenable number.

550031165665 is a deficient number, since it is larger than the sum of its proper divisors (110006233139).

550031165665 is a wasteful number, since it uses less digits than its factorization.

550031165665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110006233138.

The product of its (nonzero) digits is 405000, while the sum is 43.

The spelling of 550031165665 in words is "five hundred fifty billion, thirty-one million, one hundred sixty-five thousand, six hundred sixty-five".