6521967716 has 24 divisors (see below), whose sum is σ = 12506882304. Its totient is φ = 2951232480.

The previous prime is 6521967713. The next prime is 6521967761. The reversal of 6521967716 is 6177691256.

It is not an unprimeable number, because it can be changed into a prime (6521967713) 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, 322535 + ... + 342158.

It is an arithmetic number, because the mean of its divisors is an integer number (521120096).

Almost surely, 2^6521967716 is an apocalyptic number.

It is an amenable number.

6521967716 is a deficient number, since it is larger than the sum of its proper divisors (5984914588).

6521967716 is a wasteful number, since it uses less digits than its factorization.

6521967716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 664931 (or 664929 counting only the distinct ones).

The product of its digits is 952560, while the sum is 50.

The square root of 6521967716 is about 80758.7005591348. The cubic root of 6521967716 is about 1868.3556437153.

The spelling of 6521967716 in words is "six billion, five hundred twenty-one million, nine hundred sixty-seven thousand, seven hundred sixteen".