550666665565 has 8 divisors (see below), whose sum is σ = 661249225728. Its totient is φ = 440233847760.

The previous prime is 550666665557. The next prime is 550666665581. The reversal of 550666665565 is 565566666055.

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

It is not a de Polignac number, because 550666665565 - 2³ = 550666665557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37427497 + ... + 37442206.

It is an arithmetic number, because the mean of its divisors is an integer number (82656153216).

Almost surely, 2^550666665565 is an apocalyptic number.

It is an amenable number.

550666665565 is a deficient number, since it is larger than the sum of its proper divisors (110582560163).

550666665565 is a wasteful number, since it uses less digits than its factorization.

550666665565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74871179.

The product of its (nonzero) digits is 145800000, while the sum is 61.

The spelling of 550666665565 in words is "five hundred fifty billion, six hundred sixty-six million, six hundred sixty-five thousand, five hundred sixty-five".