6656844810 has 128 divisors (see below), whose sum is σ = 19947368448. Its totient is φ = 1381248000.

The previous prime is 6656844809. The next prime is 6656844841. The reversal of 6656844810 is 184486566.

It is a super-2 number, since 2×6656844810² = 88627165648847872200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6656844810.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2033475 + ... + 2036745.

It is an arithmetic number, because the mean of its divisors is an integer number (155838816).

Almost surely, 2^6656844810 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6656844810, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9973684224).

6656844810 is an abundant number, since it is smaller than the sum of its proper divisors (13290523638).

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

6656844810 is a wasteful number, since it uses less digits than its factorization.

6656844810 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4180.

The product of its (nonzero) digits is 1105920, while the sum is 48.

The square root of 6656844810 is about 81589.4895804601. The cubic root of 6656844810 is about 1881.1473313874.

The spelling of 6656844810 in words is "six billion, six hundred fifty-six million, eight hundred forty-four thousand, eight hundred ten".