550351665 has 40 divisors (see below), whose sum is σ = 988541928. Its totient is φ = 292930560.

The previous prime is 550351661. The next prime is 550351679. The reversal of 550351665 is 566153055.

550351665 is a `hidden beast` number, since 550 + 35 + 16 + 65 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 7834401 + 542517264 = 2799^2 + 23292^2 .

It is not a de Polignac number, because 550351665 - 2² = 550351661 is a prime.

It is a super-4 number, since 4×550351665⁴ (a number of 36 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (550351661) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 263425 + ... + 265505.

Almost surely, 2^550351665 is an apocalyptic number.

It is an amenable number.

550351665 is a deficient number, since it is larger than the sum of its proper divisors (438190263).

550351665 is a wasteful number, since it uses less digits than its factorization.

550351665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2751 (or 2742 counting only the distinct ones).

The product of its (nonzero) digits is 67500, while the sum is 36.

The square root of 550351665 is about 23459.5751240298. The cubic root of 550351665 is about 819.4958555873.

The spelling of 550351665 in words is "five hundred fifty million, three hundred fifty-one thousand, six hundred sixty-five".