550610661 has 8 divisors (see below), whose sum is σ = 734382400. Its totient is φ = 366956352.

The previous prime is 550610651. The next prime is 550610663. The reversal of 550610661 is 166016055.

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

It is not a de Polignac number, because 550610661 - 2⁹ = 550610149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (550610663) 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, 17761 + ... + 37638.

It is an arithmetic number, because the mean of its divisors is an integer number (91797800).

Almost surely, 2^550610661 is an apocalyptic number.

It is an amenable number.

550610661 is a deficient number, since it is larger than the sum of its proper divisors (183771739).

550610661 is a wasteful number, since it uses less digits than its factorization.

550610661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58715.

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

The square root of 550610661 is about 23465.0945235684. The cubic root of 550610661 is about 819.6243872616.

The spelling of 550610661 in words is "five hundred fifty million, six hundred ten thousand, six hundred sixty-one".