6650020 has 24 divisors (see below), whose sum is σ = 15039864. Its totient is φ = 2455296.

The previous prime is 6650011. The next prime is 6650041. The reversal of 6650020 is 200566.

It can be written as a sum of positive squares in 4 ways, for example, as 178084 + 6471936 = 422^2 + 2544^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 6650020.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12529 + ... + 13048.

It is an arithmetic number, because the mean of its divisors is an integer number (626661).

Almost surely, 2^6650020 is an apocalyptic number.

It is an amenable number.

6650020 is an abundant number, since it is smaller than the sum of its proper divisors (8389844).

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

6650020 is a wasteful number, since it uses less digits than its factorization.

6650020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25599 (or 25597 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 6650020 is about 2578.7632694763. The cubic root of 6650020 is about 188.0504240781.

Adding to 6650020 its reverse (200566), we get a palindrome (6850586).

It can be divided in two parts, 66 and 50020, that added together give a triangular number (50086 = T₃₁₆).

The spelling of 6650020 in words is "six million, six hundred fifty thousand, twenty".