6550665 has 48 divisors (see below), whose sum is σ = 12156480. Its totient is φ = 2983680.

The previous prime is 6550651. The next prime is 6550669. The reversal of 6550665 is 5660556.

6550665 is digitally balanced in base 3 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 6550665 - 2⁸ = 6550409 is a prime.

It is a super-2 number, since 2×6550665² = 85822423884450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

6550665 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (6550669) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 177027 + ... + 177063.

It is an arithmetic number, because the mean of its divisors is an integer number (253260).

Almost surely, 2^6550665 is an apocalyptic number.

It is an amenable number.

6550665 is a deficient number, since it is larger than the sum of its proper divisors (5605815).

6550665 is a wasteful number, since it uses less digits than its factorization.

6550665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122 (or 85 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 33.

The square root of 6550665 is about 2559.4266936171. The cubic root of 6550665 is about 187.1091949021.

Adding to 6550665 its reverse (5660556), we get a palindrome (12211221).

The spelling of 6550665 in words is "six million, five hundred fifty thousand, six hundred sixty-five".