6604660440 has 96 divisors (see below), whose sum is σ = 24531605280. Its totient is φ = 1509636096.

The previous prime is 6604660417. The next prime is 6604660441. The reversal of 6604660440 is 440664066.

It is a happy number.

6604660440 is a `hidden beast` number, since 6 + 6 + 0 + 4 + 6 + 604 + 40 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 6604660395 and 6604660404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6604660441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1307929 + ... + 1312968.

It is an arithmetic number, because the mean of its divisors is an integer number (255537555).

Almost surely, 2^6604660440 is an apocalyptic number.

6604660440 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6604660440 is an abundant number, since it is smaller than the sum of its proper divisors (17926944840).

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

6604660440 is a wasteful number, since it uses less digits than its factorization.

6604660440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2620921 (or 2620914 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 36.

The square root of 6604660440 is about 81269.0620100909. The cubic root of 6604660440 is about 1876.2188640259.

The spelling of 6604660440 in words is "six billion, six hundred four million, six hundred sixty thousand, four hundred forty".