66571156211 has 8 divisors (see below), whose sum is σ = 76112432640. Its totient is φ = 57037657608.

The previous prime is 66571156207. The next prime is 66571156237. The reversal of 66571156211 is 11265117566.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66571156211 - 2² = 66571156207 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66571156241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1926101 + ... + 1960358.

It is an arithmetic number, because the mean of its divisors is an integer number (9514054080).

Almost surely, 2^66571156211 is an apocalyptic number.

66571156211 is a deficient number, since it is larger than the sum of its proper divisors (9541276429).

66571156211 is a wasteful number, since it uses less digits than its factorization.

66571156211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3888913.

The product of its digits is 75600, while the sum is 41.

The spelling of 66571156211 in words is "sixty-six billion, five hundred seventy-one million, one hundred fifty-six thousand, two hundred eleven".