6720335668 has 24 divisors (see below), whose sum is σ = 12040693280. Its totient is φ = 3280223520.

The previous prime is 6720335659. The next prime is 6720335717. The reversal of 6720335668 is 8665330276.

It is a super-2 number, since 2×6720335668² = 90325822981186012448, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 336178 + ... + 355606.

Almost surely, 2^6720335668 is an apocalyptic number.

It is an amenable number.

6720335668 is a deficient number, since it is larger than the sum of its proper divisors (5320357612).

6720335668 is a wasteful number, since it uses less digits than its factorization.

6720335668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21487 (or 21485 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 46.

The square root of 6720335668 is about 81977.6534672712. The cubic root of 6720335668 is about 1887.1090118198.

The spelling of 6720335668 in words is "six billion, seven hundred twenty million, three hundred thirty-five thousand, six hundred sixty-eight".