550777778665 has 8 divisors (see below), whose sum is σ = 661197405888. Its totient is φ = 440446175280.

The previous prime is 550777778647. The next prime is 550777778699. The reversal of 550777778665 is 566877777055.

550777778665 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 550777778665 - 2⁹ = 550777778153 is a prime.

It is a super-2 number, since 2×550777778665² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 550777778594 and 550777778603.

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, 21992191 + ... + 22017220.

It is an arithmetic number, because the mean of its divisors is an integer number (82649675736).

Almost surely, 2^550777778665 is an apocalyptic number.

It is an amenable number.

550777778665 is a deficient number, since it is larger than the sum of its proper divisors (110419627223).

550777778665 is a wasteful number, since it uses less digits than its factorization.

550777778665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44011919.

The product of its (nonzero) digits is 605052000, while the sum is 70.

The spelling of 550777778665 in words is "five hundred fifty billion, seven hundred seventy-seven million, seven hundred seventy-eight thousand, six hundred sixty-five".