6680739 has 12 divisors (see below), whose sum is σ = 9646296. Its totient is φ = 4110912.

The previous prime is 6680731. The next prime is 6680743. The reversal of 6680739 is 9370866.

6680739 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 6680739 - 2³ = 6680731 is a prime.

It is a super-2 number, since 2×6680739² = 89264547172242, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 6680697 and 6680706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6680731) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6082 + ... + 7095.

It is an arithmetic number, because the mean of its divisors is an integer number (803858).

Almost surely, 2^6680739 is an apocalyptic number.

6680739 is a deficient number, since it is larger than the sum of its proper divisors (2965557).

6680739 is a wasteful number, since it uses less digits than its factorization.

6680739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13206 (or 13193 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 39.

The square root of 6680739 is about 2584.7125565525. The cubic root of 6680739 is about 188.3395384351.

The spelling of 6680739 in words is "six million, six hundred eighty thousand, seven hundred thirty-nine".