6620550 has 96 divisors (see below), whose sum is σ = 18213120. Its totient is φ = 1584000.

The previous prime is 6620519. The next prime is 6620587. The reversal of 6620550 is 550266.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 6620550.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 65500 + ... + 65600.

It is an arithmetic number, because the mean of its divisors is an integer number (189720).

Almost surely, 2^6620550 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6620550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9106560).

6620550 is an abundant number, since it is smaller than the sum of its proper divisors (11592570).

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

6620550 is a wasteful number, since it uses less digits than its factorization.

6620550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158 (or 153 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 6620550 is about 2573.0429456191. The cubic root of 6620550 is about 187.7722267913.

The spelling of 6620550 in words is "six million, six hundred twenty thousand, five hundred fifty".