6681715 has 4 divisors (see below), whose sum is σ = 8018064. Its totient is φ = 5345368.

The previous prime is 6681683. The next prime is 6681721. The reversal of 6681715 is 5171866.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6681715 - 2⁵ = 6681683 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 668167 + ... + 668176.

It is an arithmetic number, because the mean of its divisors is an integer number (2004516).

Almost surely, 2^6681715 is an apocalyptic number.

6681715 is a deficient number, since it is larger than the sum of its proper divisors (1336349).

6681715 is a wasteful number, since it uses less digits than its factorization.

6681715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1336348.

The product of its digits is 10080, while the sum is 34.

The square root of 6681715 is about 2584.9013520829. The cubic root of 6681715 is about 188.3487095981.

It can be divided in two parts, 6681 and 715, that added together give a square (7396 = 86²).

The spelling of 6681715 in words is "six million, six hundred eighty-one thousand, seven hundred fifteen".