6687340 has 48 divisors (see below), whose sum is σ = 15513120. Its totient is φ = 2401280.

The previous prime is 6687323. The next prime is 6687353. The reversal of 6687340 is 437866.

It is a junction number, because it is equal to n+sod(n) for n = 6687296 and 6687305.

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, 24726 + ... + 24994.

It is an arithmetic number, because the mean of its divisors is an integer number (323190).

Almost surely, 2^6687340 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6687340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7756560).

6687340 is an abundant number, since it is smaller than the sum of its proper divisors (8825780).

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

6687340 is a wasteful number, since it uses less digits than its factorization.

6687340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402 (or 400 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 6687340 is about 2585.9891724445. The cubic root of 6687340 is about 188.4015485438.

It can be divided in two parts, 668 and 7340, that added together give a palindrome (8008).

The spelling of 6687340 in words is "six million, six hundred eighty-seven thousand, three hundred forty".