66100050011 has 4 divisors (see below), whose sum is σ = 66117600912. Its totient is φ = 66082499112.

The previous prime is 66100049971. The next prime is 66100050031. The reversal of 66100050011 is 11005000166.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66100050011 is a prime.

It is a super-2 number, since 2×66100050011² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66100050031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8769800 + ... + 8777333.

It is an arithmetic number, because the mean of its divisors is an integer number (16529400228).

Almost surely, 2^66100050011 is an apocalyptic number.

66100050011 is a deficient number, since it is larger than the sum of its proper divisors (17550901).

66100050011 is a wasteful number, since it uses less digits than its factorization.

66100050011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17550900.

The product of its (nonzero) digits is 180, while the sum is 20.

Adding to 66100050011 its reverse (11005000166), we get a palindrome (77105050177).

The spelling of 66100050011 in words is "sixty-six billion, one hundred million, fifty thousand, eleven".