20610766866 has 8 divisors (see below), whose sum is σ = 41221533744. Its totient is φ = 6870255620.

The previous prime is 20610766849. The next prime is 20610766873. The reversal of 20610766866 is 66866701602.

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

20610766866 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1717563900 + ... + 1717563911.

It is an arithmetic number, because the mean of its divisors is an integer number (5152691718).

Almost surely, 2^20610766866 is an apocalyptic number.

20610766866 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20610766866 is a wasteful number, since it uses less digits than its factorization.

20610766866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3435127816.

The product of its (nonzero) digits is 870912, while the sum is 48.

The spelling of 20610766866 in words is "twenty billion, six hundred ten million, seven hundred sixty-six thousand, eight hundred sixty-six".