550106661 has 12 divisors (see below), whose sum is σ = 794237568. Its totient is φ = 338526864.

The previous prime is 550106647. The next prime is 550106681. The reversal of 550106661 is 166601055.

It is not a de Polignac number, because 550106661 - 2⁵ = 550106629 is a prime.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (550106681) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 542005 + ... + 543018.

It is an arithmetic number, because the mean of its divisors is an integer number (66186464).

Almost surely, 2^550106661 is an apocalyptic number.

It is an amenable number.

550106661 is a deficient number, since it is larger than the sum of its proper divisors (244130907).

550106661 is a wasteful number, since it uses less digits than its factorization.

550106661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1085052 (or 1085039 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 550106661 is about 23454.3527090389. The cubic root of 550106661 is about 819.3742305870.

The spelling of 550106661 in words is "five hundred fifty million, one hundred six thousand, six hundred sixty-one".