6689966446 has 16 divisors (see below), whose sum is σ = 10825719984. Its totient is φ = 3088818304.

The previous prime is 6689966431. The next prime is 6689966447. The reversal of 6689966446 is 6446699866.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6689966447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1854460 + ... + 1858063.

It is an arithmetic number, because the mean of its divisors is an integer number (676607499).

Almost surely, 2^6689966446 is an apocalyptic number.

6689966446 is a deficient number, since it is larger than the sum of its proper divisors (4135753538).

6689966446 is a wasteful number, since it uses less digits than its factorization.

6689966446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3712595.

The product of its digits is 80621568, while the sum is 64.

The square root of 6689966446 is about 81792.2150696507. The cubic root of 6689966446 is about 1884.2621015451.

The spelling of 6689966446 in words is "six billion, six hundred eighty-nine million, nine hundred sixty-six thousand, four hundred forty-six".