6687398 has 4 divisors (see below), whose sum is σ = 10031100. Its totient is φ = 3343698.

The previous prime is 6687391. The next prime is 6687427. The reversal of 6687398 is 8937866.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6687391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1671848 + ... + 1671851.

It is an arithmetic number, because the mean of its divisors is an integer number (2507775).

Almost surely, 2^6687398 is an apocalyptic number.

6687398 is a deficient number, since it is larger than the sum of its proper divisors (3343702).

6687398 is a wasteful number, since it uses less digits than its factorization.

6687398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3343701.

The product of its digits is 435456, while the sum is 47.

The square root of 6687398 is about 2586.0003866976. Note that the first 3 decimals coincide. The cubic root of 6687398 is about 188.4020932177.

The spelling of 6687398 in words is "six million, six hundred eighty-seven thousand, three hundred ninety-eight".