6721002016208 has 10 divisors (see below), whose sum is σ = 13021941406434. Its totient is φ = 3360501008096.

The previous prime is 6721002016187. The next prime is 6721002016219. The reversal of 6721002016208 is 8026102001276.

It can be written as a sum of positive squares in only one way, i.e., 6716245431184 + 4756585024 = 2591572^2 + 68968^2 .

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, 210031312991 + ... + 210031313022.

Almost surely, 2^{6721002016208} is an apocalyptic number.

It is an amenable number.

6721002016208 is a deficient number, since it is larger than the sum of its proper divisors (6300939390226).

6721002016208 is a wasteful number, since it uses less digits than its factorization.

6721002016208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420062626021 (or 420062626015 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 35.

The spelling of 6721002016208 in words is "six trillion, seven hundred twenty-one billion, two million, sixteen thousand, two hundred eight".