6689898 has 16 divisors (see below), whose sum is σ = 14866560. Its totient is φ = 2229948.

The previous prime is 6689873. The next prime is 6689909. The reversal of 6689898 is 8989866.

It is a Harshad number since it is a multiple of its sum of digits (54), and also a Moran number because the ratio is a prime number: 123887 = 6689898 / (6 + 6 + 8 + 9 + 8 + 9 + 8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61890 + ... + 61997.

It is an arithmetic number, because the mean of its divisors is an integer number (929160).

Almost surely, 2^6689898 is an apocalyptic number.

6689898 is an abundant number, since it is smaller than the sum of its proper divisors (8176662).

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

6689898 is a wasteful number, since it uses less digits than its factorization.

6689898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123898 (or 123892 counting only the distinct ones).

The product of its digits is 1492992, while the sum is 54.

The square root of 6689898 is about 2586.4837134612. The cubic root of 6689898 is about 188.4255675472.

Subtracting 6689898 from its reverse (8989866), we obtain a cube (2299968 = 132³).

The spelling of 6689898 in words is "six million, six hundred eighty-nine thousand, eight hundred ninety-eight".