6550000 has 60 divisors (see below), whose sum is σ = 15983352. Its totient is φ = 2600000.

The previous prime is 6549979. The next prime is 6550001. The reversal of 6550000 is 556.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a nialpdrome in base 10.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6550001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 49935 + ... + 50065.

Almost surely, 2^6550000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6550000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7991676).

6550000 is an abundant number, since it is smaller than the sum of its proper divisors (9433352).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6550000 is an equidigital number, since it uses as much as digits as its factorization.

6550000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164 (or 138 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 16.

The square root of 6550000 is about 2559.2967784139. The cubic root of 6550000 is about 187.1028631366.

Adding to 6550000 its reverse (556), we get a palindrome (6550556).

The spelling of 6550000 in words is "six million, five hundred fifty thousand".