6528978663 has 8 divisors (see below), whose sum is σ = 8707666800. Its totient is φ = 4351471488.

The previous prime is 6528978587. The next prime is 6528978689. The reversal of 6528978663 is 3668798256.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-6528978663 is a prime.

It is a super-3 number, since 3×6528978663³ (a number of 30 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6528978597 and 6528978606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6528978263) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 282258 + ... + 304511.

It is an arithmetic number, because the mean of its divisors is an integer number (1088458350).

Almost surely, 2^6528978663 is an apocalyptic number.

6528978663 is a deficient number, since it is larger than the sum of its proper divisors (2178688137).

6528978663 is a wasteful number, since it uses less digits than its factorization.

6528978663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 590481.

The product of its digits is 26127360, while the sum is 60.

The square root of 6528978663 is about 80802.0956597043. The cubic root of 6528978663 is about 1869.0248820031.

The spelling of 6528978663 in words is "six billion, five hundred twenty-eight million, nine hundred seventy-eight thousand, six hundred sixty-three".