8680664666 has 8 divisors (see below), whose sum is σ = 13021586580. Its totient is φ = 4340135808.

The previous prime is 8680664651. The next prime is 8680664677. The reversal of 8680664666 is 6664660868.

It can be written as a sum of positive squares in 2 ways, for example, as 7838446225 + 842218441 = 88535^2 + 29021^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34871 + ... + 136298.

Almost surely, 2^8680664666 is an apocalyptic number.

8680664666 is a deficient number, since it is larger than the sum of its proper divisors (4340921914).

8680664666 is a wasteful number, since it uses less digits than its factorization.

8680664666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196528.

The product of its (nonzero) digits is 11943936, while the sum is 56.

The square root of 8680664666 is about 93170.0846087412. The cubic root of 8680664666 is about 2055.1853394365.

The spelling of 8680664666 in words is "eight billion, six hundred eighty million, six hundred sixty-four thousand, six hundred sixty-six".