6680424923721 has 8 divisors (see below), whose sum is σ = 9896925812960. Its totient is φ = 4453616615796.

The previous prime is 6680424923717. The next prime is 6680424923729. The reversal of 6680424923721 is 1273294240866.

It is a happy number.

6680424923721 is a `hidden beast` number, since 6 + 6 + 80 + 4 + 2 + 492 + 3 + 72 + 1 = 666.

It is not a de Polignac number, because 6680424923721 - 2² = 6680424923717 is a prime.

It is a super-2 number, since 2×6680424923721² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6680424923729) 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, 123711572635 + ... + 123711572688.

It is an arithmetic number, because the mean of its divisors is an integer number (1237115726620).

Almost surely, 2^{6680424923721} is an apocalyptic number.

It is an amenable number.

6680424923721 is a deficient number, since it is larger than the sum of its proper divisors (3216500889239).

6680424923721 is a wasteful number, since it uses less digits than its factorization.

6680424923721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247423145332 (or 247423145326 counting only the distinct ones).

The product of its (nonzero) digits is 6967296, while the sum is 54.

The spelling of 6680424923721 in words is "six trillion, six hundred eighty billion, four hundred twenty-four million, nine hundred twenty-three thousand, seven hundred twenty-one".