6520998805 has 32 divisors (see below), whose sum is σ = 8523491328. Its totient is φ = 4770124800.

The previous prime is 6520998787. The next prime is 6520998811. The reversal of 6520998805 is 5088990256.

It is not a de Polignac number, because 6520998805 - 2⁹ = 6520998293 is a prime.

It is a super-2 number, since 2×6520998805² = 85046850829622856050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 693435 + ... + 702775.

It is an arithmetic number, because the mean of its divisors is an integer number (266359104).

Almost surely, 2^6520998805 is an apocalyptic number.

It is an amenable number.

6520998805 is a deficient number, since it is larger than the sum of its proper divisors (2002492523).

6520998805 is a wasteful number, since it uses less digits than its factorization.

6520998805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9597.

The product of its (nonzero) digits is 1555200, while the sum is 52.

The square root of 6520998805 is about 80752.7015337568. The cubic root of 6520998805 is about 1868.2631174479.

The spelling of 6520998805 in words is "six billion, five hundred twenty million, nine hundred ninety-eight thousand, eight hundred five".