6681698 has 4 divisors (see below), whose sum is σ = 10022550. Its totient is φ = 3340848.

The previous prime is 6681683. The next prime is 6681721. The reversal of 6681698 is 8961866.

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

It can be written as a sum of positive squares in only one way, i.e., 5987809 + 693889 = 2447^2 + 833^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1670423 + ... + 1670426.

Almost surely, 2^6681698 is an apocalyptic number.

6681698 is a deficient number, since it is larger than the sum of its proper divisors (3340852).

6681698 is a wasteful number, since it uses less digits than its factorization.

6681698 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3340851.

The product of its digits is 124416, while the sum is 44.

The square root of 6681698 is about 2584.8980637542. The cubic root of 6681698 is about 188.3485498622.

The spelling of 6681698 in words is "six million, six hundred eighty-one thousand, six hundred ninety-eight".