6659099 has 4 divisors (see below), whose sum is σ = 6665136. Its totient is φ = 6653064.

The previous prime is 6659089. The next prime is 6659111. The reversal of 6659099 is 9909566.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 6659099 - 2⁸ = 6658843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6659089) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 839 + ... + 3744.

It is an arithmetic number, because the mean of its divisors is an integer number (1666284).

Almost surely, 2^6659099 is an apocalyptic number.

6659099 is a deficient number, since it is larger than the sum of its proper divisors (6037).

6659099 is a wasteful number, since it uses less digits than its factorization.

6659099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6036.

The product of its (nonzero) digits is 131220, while the sum is 44.

The square root of 6659099 is about 2580.5230090042. The cubic root of 6659099 is about 188.1359643430.

The spelling of 6659099 in words is "six million, six hundred fifty-nine thousand, ninety-nine".