6659879 has 6 divisors (see below), whose sum is σ = 6898320. Its totient is φ = 6429416.

The previous prime is 6659843. The next prime is 6659893. The reversal of 6659879 is 9789566.

It is not a de Polignac number, because 6659879 - 2⁸ = 6659623 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6659579) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3119 + ... + 4800.

It is an arithmetic number, because the mean of its divisors is an integer number (1149720).

Almost surely, 2^6659879 is an apocalyptic number.

6659879 is a deficient number, since it is larger than the sum of its proper divisors (238441).

6659879 is an equidigital number, since it uses as much as digits as its factorization.

6659879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7977 (or 7948 counting only the distinct ones).

The product of its digits is 816480, while the sum is 50.

The square root of 6659879 is about 2580.6741367325. The cubic root of 6659879 is about 188.1433096972.

The spelling of 6659879 in words is "six million, six hundred fifty-nine thousand, eight hundred seventy-nine".