66358542211 has 4 divisors (see below), whose sum is σ = 71463045472. Its totient is φ = 61254038952.

The previous prime is 66358542191. The next prime is 66358542233. The reversal of 66358542211 is 11224585366.

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

It is a cyclic number.

It is not a de Polignac number, because 66358542211 - 2⁹ = 66358541699 is a prime.

It is a super-2 number, since 2×66358542211² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66358942211) 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, 2552251611 + ... + 2552251636.

It is an arithmetic number, because the mean of its divisors is an integer number (17865761368).

Almost surely, 2^66358542211 is an apocalyptic number.

66358542211 is a deficient number, since it is larger than the sum of its proper divisors (5104503261).

66358542211 is a wasteful number, since it uses less digits than its factorization.

66358542211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5104503260.

The product of its digits is 345600, while the sum is 43.

The spelling of 66358542211 in words is "sixty-six billion, three hundred fifty-eight million, five hundred forty-two thousand, two hundred eleven".