6659109806 has 4 divisors (see below), whose sum is σ = 9988664712. Its totient is φ = 3329554902.

The previous prime is 6659109773. The next prime is 6659109869. The reversal of 6659109806 is 6089019566.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1664777450 + ... + 1664777453.

It is an arithmetic number, because the mean of its divisors is an integer number (2497166178).

Almost surely, 2^6659109806 is an apocalyptic number.

6659109806 is a deficient number, since it is larger than the sum of its proper divisors (3329554906).

6659109806 is a wasteful number, since it uses less digits than its factorization.

6659109806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3329554905.

The product of its (nonzero) digits is 699840, while the sum is 50.

The square root of 6659109806 is about 81603.3688397728. The cubic root of 6659109806 is about 1881.3606610828.

The spelling of 6659109806 in words is "six billion, six hundred fifty-nine million, one hundred nine thousand, eight hundred six".