7868980666 has 8 divisors (see below), whose sum is σ = 12184228224. Its totient is φ = 3807571260.

The previous prime is 7868980643. The next prime is 7868980673. The reversal of 7868980666 is 6660898687.

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

It is a junction number, because it is equal to n+sod(n) for n = 7868980598 and 7868980607.

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, 63459460 + ... + 63459583.

It is an arithmetic number, because the mean of its divisors is an integer number (1523028528).

Almost surely, 2^7868980666 is an apocalyptic number.

7868980666 is a deficient number, since it is larger than the sum of its proper divisors (4315247558).

7868980666 is a wasteful number, since it uses less digits than its factorization.

7868980666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126919076.

The product of its (nonzero) digits is 41803776, while the sum is 64.

The square root of 7868980666 is about 88707.2751582417. The cubic root of 7868980666 is about 1989.0215694636.

The spelling of 7868980666 in words is "seven billion, eight hundred sixty-eight million, nine hundred eighty thousand, six hundred sixty-six".