6521659996 has 6 divisors (see below), whose sum is σ = 11412905000. Its totient is φ = 3260829996.

The previous prime is 6521659967. The next prime is 6521660009. The reversal of 6521659996 is 6999561256.

It is a self number, because there is not a number n which added to its sum of digits gives 6521659996.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 815207496 + ... + 815207503.

Almost surely, 2^6521659996 is an apocalyptic number.

It is an amenable number.

6521659996 is a deficient number, since it is larger than the sum of its proper divisors (4891245004).

6521659996 is a wasteful number, since it uses less digits than its factorization.

6521659996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1630415003 (or 1630415001 counting only the distinct ones).

The product of its digits is 7873200, while the sum is 58.

The square root of 6521659996 is about 80756.7953549421. The cubic root of 6521659996 is about 1868.3262589516.

The spelling of 6521659996 in words is "six billion, five hundred twenty-one million, six hundred fifty-nine thousand, nine hundred ninety-six".