66827872866 has 16 divisors (see below), whose sum is σ = 135538221888. Its totient is φ = 21962211600.

The previous prime is 66827872819. The next prime is 66827872877.

66827872866 is nontrivially palindromic in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 66827872797 and 66827872806.

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 7 ways as a sum of consecutive naturals, for example, 78436045 + ... + 78436896.

It is an arithmetic number, because the mean of its divisors is an integer number (8471138868).

Almost surely, 2^66827872866 is an apocalyptic number.

66827872866 is an abundant number, since it is smaller than the sum of its proper divisors (68710349022).

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

66827872866 is a wasteful number, since it uses less digits than its factorization.

66827872866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156873017.

The product of its digits is 130056192, while the sum is 66.

The spelling of 66827872866 in words is "sixty-six billion, eight hundred twenty-seven million, eight hundred seventy-two thousand, eight hundred sixty-six".