550665686 has 4 divisors (see below), whose sum is σ = 825998532. Its totient is φ = 275332842.

The previous prime is 550665673. The next prime is 550665691. The reversal of 550665686 is 686566055.

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 550665686.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 137666420 + ... + 137666423.

It is an arithmetic number, because the mean of its divisors is an integer number (206499633).

Almost surely, 2^550665686 is an apocalyptic number.

550665686 is a deficient number, since it is larger than the sum of its proper divisors (275332846).

550665686 is a wasteful number, since it uses less digits than its factorization.

550665686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275332845.

The product of its (nonzero) digits is 1296000, while the sum is 47.

The square root of 550665686 is about 23466.2669804978. The cubic root of 550665686 is about 819.6516892694.

The spelling of 550665686 in words is "five hundred fifty million, six hundred sixty-five thousand, six hundred eighty-six".