550440661 has 8 divisors (see below), whose sum is σ = 553472640. Its totient is φ = 547415232.

The previous prime is 550440629. The next prime is 550440673. The reversal of 550440661 is 166044055.

550440661 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 a cyclic number.

It is not a de Polignac number, because 550440661 - 2⁵ = 550440629 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 (550440461) 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, 353661 + ... + 355213.

It is an arithmetic number, because the mean of its divisors is an integer number (69184080).

Almost surely, 2^550440661 is an apocalyptic number.

It is an amenable number.

550440661 is a deficient number, since it is larger than the sum of its proper divisors (3031979).

550440661 is a wasteful number, since it uses less digits than its factorization.

550440661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3275.

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 550440661 is about 23461.4718421501. The cubic root of 550440661 is about 819.5400260858.

The spelling of 550440661 in words is "five hundred fifty million, four hundred forty thousand, six hundred sixty-one".