6720437846668 has 48 divisors (see below), whose sum is σ = 14973919894080. Its totient is φ = 2566957688064.

The previous prime is 6720437846659. The next prime is 6720437846719. The reversal of 6720437846668 is 8666487340276.

It is a Smith number, since the sum of its digits (67) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 318312571 + ... + 318333682.

It is an arithmetic number, because the mean of its divisors is an integer number (311956664460).

Almost surely, 2^{6720437846668} is an apocalyptic number.

It is an amenable number.

6720437846668 is an abundant number, since it is smaller than the sum of its proper divisors (8253482047412).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6720437846668 is a wasteful number, since it uses less digits than its factorization.

6720437846668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 636646306 (or 636646304 counting only the distinct ones).

The product of its (nonzero) digits is 390168576, while the sum is 67.

The spelling of 6720437846668 in words is "six trillion, seven hundred twenty billion, four hundred thirty-seven million, eight hundred forty-six thousand, six hundred sixty-eight".