66864111941 has 16 divisors (see below), whose sum is σ = 73314705408. Its totient is φ = 60475863600.

The previous prime is 66864111929. The next prime is 66864111967. The reversal of 66864111941 is 14911146866.

It is a cyclic number.

It is not a de Polignac number, because 66864111941 - 2¹⁰ = 66864110917 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66864111971) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 4484000 + ... + 4498886.

It is an arithmetic number, because the mean of its divisors is an integer number (4582169088).

Almost surely, 2^66864111941 is an apocalyptic number.

It is an amenable number.

66864111941 is a deficient number, since it is larger than the sum of its proper divisors (6450593467).

66864111941 is a wasteful number, since it uses less digits than its factorization.

66864111941 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16952.

The product of its digits is 248832, while the sum is 47.

The spelling of 66864111941 in words is "sixty-six billion, eight hundred sixty-four million, one hundred eleven thousand, nine hundred forty-one".