6647679432 has 96 divisors (see below), whose sum is σ = 18862721280. Its totient is φ = 2112359040.

The previous prime is 6647679421. The next prime is 6647679433. The reversal of 6647679432 is 2349767466.

6647679432 is a `hidden beast` number, since 66 + 476 + 79 + 43 + 2 = 666.

It is not an unprimeable number, because it can be changed into a prime (6647679433) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 127318 + ... + 171770.

It is an arithmetic number, because the mean of its divisors is an integer number (196486680).

Almost surely, 2^6647679432 is an apocalyptic number.

6647679432 is a gapful number since it is divisible by the number (62) 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 6647679432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9431360640).

6647679432 is an abundant number, since it is smaller than the sum of its proper divisors (12215041848).

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

6647679432 is a wasteful number, since it uses less digits than its factorization.

6647679432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44563 (or 44556 counting only the distinct ones).

The product of its digits is 9144576, while the sum is 54.

The square root of 6647679432 is about 81533.3025947067. The cubic root of 6647679432 is about 1880.2835915936.

The spelling of 6647679432 in words is "six billion, six hundred forty-seven million, six hundred seventy-nine thousand, four hundred thirty-two".