6720779684 has 24 divisors (see below), whose sum is σ = 11820725280. Its totient is φ = 3343452224.

The previous prime is 6720779683. The next prime is 6720779713. The reversal of 6720779684 is 4869770276.

It is not an unprimeable number, because it can be changed into a prime (6720779683) 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, 2178407 + ... + 2181489.

It is an arithmetic number, because the mean of its divisors is an integer number (492530220).

Almost surely, 2^6720779684 is an apocalyptic number.

It is an amenable number.

6720779684 is a deficient number, since it is larger than the sum of its proper divisors (5099945596).

6720779684 is a wasteful number, since it uses less digits than its factorization.

6720779684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5659 (or 5657 counting only the distinct ones).

The product of its (nonzero) digits is 7112448, while the sum is 56.

The square root of 6720779684 is about 81980.3615751968. The cubic root of 6720779684 is about 1887.1505716557.

The spelling of 6720779684 in words is "six billion, seven hundred twenty million, seven hundred seventy-nine thousand, six hundred eighty-four".