6620026100 has 36 divisors (see below), whose sum is σ = 15210487404. Its totient is φ = 2492244480.

The previous prime is 6620026087. The next prime is 6620026139. The reversal of 6620026100 is 16200266.

It can be written as a sum of positive squares in 6 ways, for example, as 665743204 + 5954282896 = 25802^2 + 77164^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1945367 + ... + 1948766.

It is an arithmetic number, because the mean of its divisors is an integer number (422513539).

Almost surely, 2^6620026100 is an apocalyptic number.

It is an amenable number.

6620026100 is an abundant number, since it is smaller than the sum of its proper divisors (8590461304).

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

6620026100 is a wasteful number, since it uses less digits than its factorization.

6620026100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3894164 (or 3894157 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 6620026100 is about 81363.5428186359. The cubic root of 6620026100 is about 1877.6727370513.

Adding to 6620026100 its reverse (16200266), we get a palindrome (6636226366).

The spelling of 6620026100 in words is "six billion, six hundred twenty million, twenty-six thousand, one hundred".