6609517920 has 192 divisors, whose sum is σ = 23373282240. Its totient is φ = 1744257024.

The previous prime is 6609517883. The next prime is 6609517939. The reversal of 6609517920 is 297159066.

It is a happy number.

6609517920 is a `hidden beast` number, since 6 + 609 + 5 + 17 + 9 + 20 = 666.

It is a super-2 number, since 2×6609517920² = 87371454269602252800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 411154 + ... + 426926.

It is an arithmetic number, because the mean of its divisors is an integer number (121735845).

Almost surely, 2^6609517920 is an apocalyptic number.

6609517920 is a gapful number since it is divisible by the number (60) 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 6609517920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11686641120).

6609517920 is an abundant number, since it is smaller than the sum of its proper divisors (16763764320).

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

6609517920 is a wasteful number, since it uses less digits than its factorization.

6609517920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15894 (or 15880 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 45.

The square root of 6609517920 is about 81298.9416905288. The cubic root of 6609517920 is about 1876.6787141748.

The spelling of 6609517920 in words is "six billion, six hundred nine million, five hundred seventeen thousand, nine hundred twenty".