6721413668 has 12 divisors (see below), whose sum is σ = 11764515840. Its totient is φ = 3360123432.

The previous prime is 6721413619. The next prime is 6721413697. The reversal of 6721413668 is 8663141276.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 119396 + ... + 166427.

It is an arithmetic number, because the mean of its divisors is an integer number (980376320).

Almost surely, 2^6721413668 is an apocalyptic number.

It is an amenable number.

6721413668 is a deficient number, since it is larger than the sum of its proper divisors (5043102172).

6721413668 is a wasteful number, since it uses less digits than its factorization.

6721413668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291706 (or 291704 counting only the distinct ones).

The product of its digits is 290304, while the sum is 44.

The square root of 6721413668 is about 81984.2281661540. The cubic root of 6721413668 is about 1887.2099092973.

The spelling of 6721413668 in words is "six billion, seven hundred twenty-one million, four hundred thirteen thousand, six hundred sixty-eight".