6647195020 has 24 divisors (see below), whose sum is σ = 13961199168. Its totient is φ = 2658480000.

The previous prime is 6647194997. The next prime is 6647195029. The reversal of 6647195020 is 205917466.

It is not an unprimeable number, because it can be changed into a prime (6647195029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 138120 + ... + 179920.

It is an arithmetic number, because the mean of its divisors is an integer number (581716632).

Almost surely, 2^6647195020 is an apocalyptic number.

It is an amenable number.

6647195020 is an abundant number, since it is smaller than the sum of its proper divisors (7314004148).

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

6647195020 is a wasteful number, since it uses less digits than its factorization.

6647195020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49761 (or 49759 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 6647195020 is about 81530.3319016917. The cubic root of 6647195020 is about 1880.2379188106.

The spelling of 6647195020 in words is "six billion, six hundred forty-seven million, one hundred ninety-five thousand, twenty".