66911018113 has 4 divisors (see below), whose sum is σ = 66911550768. Its totient is φ = 66910485460.

The previous prime is 66911018033. The next prime is 66911018117. The reversal of 66911018113 is 31181011966.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66911018113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66911018117) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38070 + ... + 367792.

It is an arithmetic number, because the mean of its divisors is an integer number (16727887692).

Almost surely, 2^66911018113 is an apocalyptic number.

It is an amenable number.

66911018113 is a deficient number, since it is larger than the sum of its proper divisors (532655).

66911018113 is a wasteful number, since it uses less digits than its factorization.

66911018113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 532654.

The product of its (nonzero) digits is 7776, while the sum is 37.

The spelling of 66911018113 in words is "sixty-six billion, nine hundred eleven million, eighteen thousand, one hundred thirteen".