6650000 has 120 divisors (see below), whose sum is σ = 19373760. Its totient is φ = 2160000.

The previous prime is 6649999. The next prime is 6650003. The reversal of 6650000 is 566.

It is a happy number.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (6650003) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 349991 + ... + 350009.

It is an arithmetic number, because the mean of its divisors is an integer number (161448).

Almost surely, 2^6650000 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 6650000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9686880).

6650000 is an abundant number, since it is smaller than the sum of its proper divisors (12723760).

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

6650000 is an equidigital number, since it uses as much as digits as its factorization.

6650000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59 (or 33 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 6650000 is about 2578.7593916455. The cubic root of 6650000 is about 188.0502355568.

Adding to 6650000 its reverse (566), we get a palindrome (6650566).

The spelling of 6650000 in words is "six million, six hundred fifty thousand".