6620020 has 24 divisors (see below), whose sum is σ = 15166368. Its totient is φ = 2407200.

The previous prime is 6620017. The next prime is 6620027. The reversal of 6620020 is 200266.

It is a junction number, because it is equal to n+sod(n) for n = 6619976 and 6620003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6620027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14826 + ... + 15265.

It is an arithmetic number, because the mean of its divisors is an integer number (631932).

Almost surely, 2^6620020 is an apocalyptic number.

It is an amenable number.

6620020 is an abundant number, since it is smaller than the sum of its proper divisors (8546348).

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

6620020 is a wasteful number, since it uses less digits than its factorization.

6620020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30111 (or 30109 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 6620020 is about 2572.9399526612. The cubic root of 6620020 is about 187.7672160326.

Adding to 6620020 its reverse (200266), we get a palindrome (6820286).

It can be divided in two parts, 6 and 620020, that added together give a palindrome (620026).

The spelling of 6620020 in words is "six million, six hundred twenty thousand, twenty".