66883822838866 has 64 divisors (see below), whose sum is σ = 115875659759616. Its totient is φ = 28657315561600.

The previous prime is 66883822838837. The next prime is 66883822838977.

66883822838866 is nontrivially palindromic in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 66883822838866.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7107246 + ... + 13574998.

It is an arithmetic number, because the mean of its divisors is an integer number (1810557183744).

Almost surely, 2^{66883822838866} is an apocalyptic number.

66883822838866 is a deficient number, since it is larger than the sum of its proper divisors (48991836920750).

66883822838866 is a wasteful number, since it uses less digits than its factorization.

66883822838866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6468087.

The product of its digits is 12230590464, while the sum is 82.

The spelling of 66883822838866 in words is "sixty-six trillion, eight hundred eighty-three billion, eight hundred twenty-two million, eight hundred thirty-eight thousand, eight hundred sixty-six".