6609695820 has 192 divisors, whose sum is σ = 22931736576. Its totient is φ = 1385164800.

The previous prime is 6609695777. The next prime is 6609695821. The reversal of 6609695820 is 285969066.

It is not an unprimeable number, because it can be changed into a prime (6609695821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 820452 + ... + 828468.

It is an arithmetic number, because the mean of its divisors is an integer number (119436128).

Almost surely, 2^6609695820 is an apocalyptic number.

6609695820 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6609695820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11465868288).

6609695820 is an abundant number, since it is smaller than the sum of its proper divisors (16322040756).

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

6609695820 is a wasteful number, since it uses less digits than its factorization.

6609695820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8200 (or 8198 counting only the distinct ones).

The product of its (nonzero) digits is 1399680, while the sum is 51.

The square root of 6609695820 is about 81300.0357933501. The cubic root of 6609695820 is about 1876.6955514163.

The spelling of 6609695820 in words is "six billion, six hundred nine million, six hundred ninety-five thousand, eight hundred twenty".