6660860866 has 8 divisors (see below), whose sum is σ = 10899590544. Its totient is φ = 3027664020.

The previous prime is 6660860819. The next prime is 6660860867. The reversal of 6660860866 is 6680680666.

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

It is not an unprimeable number, because it can be changed into a prime (6660860867) 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, 151383180 + ... + 151383223.

It is an arithmetic number, because the mean of its divisors is an integer number (1362448818).

Almost surely, 2^6660860866 is an apocalyptic number.

6660860866 is a deficient number, since it is larger than the sum of its proper divisors (4238729678).

6660860866 is a wasteful number, since it uses less digits than its factorization.

6660860866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302766416.

The product of its (nonzero) digits is 2985984, while the sum is 52.

The square root of 6660860866 is about 81614.0972259082. The cubic root of 6660860866 is about 1881.5255523259.

The spelling of 6660860866 in words is "six billion, six hundred sixty million, eight hundred sixty thousand, eight hundred sixty-six".