6684204420 has 36 divisors (see below), whose sum is σ = 20275420620. Its totient is φ = 1782454464.

The previous prime is 6684204367. The next prime is 6684204421. The reversal of 6684204420 is 244024866.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1329477444 + 5354726976 = 36462^2 + 73176^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (6684204421) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18567055 + ... + 18567414.

Almost surely, 2^6684204420 is an apocalyptic number.

6684204420 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6684204420 is an abundant number, since it is smaller than the sum of its proper divisors (13591216200).

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

6684204420 is a wasteful number, since it uses less digits than its factorization.

6684204420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37134484 (or 37134479 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 36.

The square root of 6684204420 is about 81756.9839218644. The cubic root of 6684204420 is about 1883.7209784632.

The spelling of 6684204420 in words is "six billion, six hundred eighty-four million, two hundred four thousand, four hundred twenty".