6609003840 has 140 divisors (see below), whose sum is σ = 23509481556. Its totient is φ = 1762394112.

The previous prime is 6609003769. The next prime is 6609003851. The reversal of 6609003840 is 483009066.

6609003840 is a `hidden beast` number, since 6 + 609 + 0 + 0 + 3 + 8 + 40 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 4948278336 + 1660725504 = 70344^2 + 40752^2 .

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 = 6609003795 and 6609003804.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 101569 + ... + 153408.

Almost surely, 2^6609003840 is an apocalyptic number.

6609003840 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6609003840 is an abundant number, since it is smaller than the sum of its proper divisors (16900477716).

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

6609003840 is a wasteful number, since it uses less digits than its factorization.

6609003840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255006 (or 254987 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 6609003840 is about 81295.7799642761. The cubic root of 6609003840 is about 1876.6300576757.

The spelling of 6609003840 in words is "six billion, six hundred nine million, three thousand, eight hundred forty".