66801022010866 has 32 divisors (see below), whose sum is σ = 122837513275008. Its totient is φ = 26809774717440.

The previous prime is 66801022010831. The next prime is 66801022010887.

66801022010866 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5077602271 + ... + 5077615426.

It is an arithmetic number, because the mean of its divisors is an integer number (3838672289844).

Almost surely, 2^{66801022010866} is an apocalyptic number.

66801022010866 is a deficient number, since it is larger than the sum of its proper divisors (56036491264142).

66801022010866 is a wasteful number, since it uses less digits than its factorization.

66801022010866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10155217746.

The product of its (nonzero) digits is 331776, while the sum is 46.

It can be divided in two parts, 6680102 and 2010866, that added together give a palindrome (8690968).

The spelling of 66801022010866 in words is "sixty-six trillion, eight hundred one billion, twenty-two million, ten thousand, eight hundred sixty-six".