66655471111 has 8 divisors (see below), whose sum is σ = 68524498944. Its totient is φ = 64805227800.

The previous prime is 66655471093. The next prime is 66655471123. The reversal of 66655471111 is 11117455666.

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 66655471111 - 2⁷ = 66655470983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66655471171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4688935 + ... + 4703128.

It is an arithmetic number, because the mean of its divisors is an integer number (8565562368).

Almost surely, 2^66655471111 is an apocalyptic number.

66655471111 is a deficient number, since it is larger than the sum of its proper divisors (1869027833).

66655471111 is a wasteful number, since it uses less digits than its factorization.

66655471111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9392261.

The product of its digits is 151200, while the sum is 43.

The spelling of 66655471111 in words is "sixty-six billion, six hundred fifty-five million, four hundred seventy-one thousand, one hundred eleven".