66311811366 has 32 divisors (see below), whose sum is σ = 136224227040. Its totient is φ = 21503978496.

The previous prime is 66311811353. The next prime is 66311811367.

It is a happy number.

66311811366 is nontrivially palindromic in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66311811367) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3036960 + ... + 3058716.

It is an arithmetic number, because the mean of its divisors is an integer number (4257007095).

Almost surely, 2^66311811366 is an apocalyptic number.

66311811366 is an abundant number, since it is smaller than the sum of its proper divisors (69912415674).

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

66311811366 is a wasteful number, since it uses less digits than its factorization.

66311811366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35528.

The product of its digits is 93312, while the sum is 42.

The spelling of 66311811366 in words is "sixty-six billion, three hundred eleven million, eight hundred eleven thousand, three hundred sixty-six".