550220066421 has 8 divisors (see below), whose sum is σ = 733642584864. Its totient is φ = 366805462800.

The previous prime is 550220066419. The next prime is 550220066447. The reversal of 550220066421 is 124660022055.

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

It is not a de Polignac number, because 550220066421 - 2¹ = 550220066419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (550220066491) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1814551 + ... + 2095956.

It is an arithmetic number, because the mean of its divisors is an integer number (91705323108).

Almost surely, 2^550220066421 is an apocalyptic number.

It is an amenable number.

550220066421 is a deficient number, since it is larger than the sum of its proper divisors (183422518443).

550220066421 is a wasteful number, since it uses less digits than its factorization.

550220066421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3957411.

The product of its (nonzero) digits is 28800, while the sum is 33.

Adding to 550220066421 its reverse (124660022055), we get a palindrome (674880088476).

The spelling of 550220066421 in words is "five hundred fifty billion, two hundred twenty million, sixty-six thousand, four hundred twenty-one".