6666809179 has 4 divisors (see below), whose sum is σ = 6667386480. Its totient is φ = 6666231880.

The previous prime is 6666809119. The next prime is 6666809207. The reversal of 6666809179 is 9719086666.

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

It is a cyclic number.

It is not a de Polignac number, because 6666809179 - 2⁹ = 6666808667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6666809119) 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, 270967 + ... + 294544.

It is an arithmetic number, because the mean of its divisors is an integer number (1666846620).

Almost surely, 2^6666809179 is an apocalyptic number.

6666809179 is a deficient number, since it is larger than the sum of its proper divisors (577301).

6666809179 is a wasteful number, since it uses less digits than its factorization.

6666809179 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 577300.

The product of its (nonzero) digits is 5878656, while the sum is 58.

The square root of 6666809179 is about 81650.5307943555. The cubic root of 6666809179 is about 1882.0854685905.

The spelling of 6666809179 in words is "six billion, six hundred sixty-six million, eight hundred nine thousand, one hundred seventy-nine".