6520547760 has 80 divisors (see below), whose sum is σ = 20302914816. Its totient is φ = 1731138304.

The previous prime is 6520547753. The next prime is 6520547783. The reversal of 6520547760 is 677450256.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5364 + ... + 114323.

Almost surely, 2^6520547760 is an apocalyptic number.

6520547760 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 6520547760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10151457408).

6520547760 is an abundant number, since it is smaller than the sum of its proper divisors (13782367056).

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

6520547760 is a wasteful number, since it uses less digits than its factorization.

6520547760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119930 (or 119924 counting only the distinct ones).

The product of its (nonzero) digits is 352800, while the sum is 42.

The square root of 6520547760 is about 80749.9087305986. The cubic root of 6520547760 is about 1868.2200417273.

The spelling of 6520547760 in words is "six billion, five hundred twenty million, five hundred forty-seven thousand, seven hundred sixty".