6659397 has 24 divisors (see below), whose sum is σ = 10243584. Its totient is φ = 4159584.

The previous prime is 6659377. The next prime is 6659399. The reversal of 6659397 is 7939566.

It is not a de Polignac number, because 6659397 - 2⁶ = 6659333 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6659399) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10668 + ... + 11274.

It is an arithmetic number, because the mean of its divisors is an integer number (426816).

Almost surely, 2^6659397 is an apocalyptic number.

It is an amenable number.

6659397 is a deficient number, since it is larger than the sum of its proper divisors (3584187).

6659397 is a wasteful number, since it uses less digits than its factorization.

6659397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 689 (or 686 counting only the distinct ones).

The product of its digits is 306180, while the sum is 45.

The square root of 6659397 is about 2580.5807485913. The cubic root of 6659397 is about 188.1387707127.

It can be divided in two parts, 6659 and 397, that added together give a square (7056 = 84²).

The spelling of 6659397 in words is "six million, six hundred fifty-nine thousand, three hundred ninety-seven".