66145474111 has 8 divisors (see below), whose sum is σ = 67556744640. Its totient is φ = 64734367008.

The previous prime is 66145474091. The next prime is 66145474121. The reversal of 66145474111 is 11147454166.

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 66145474111 - 2¹⁷ = 66145343039 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 (66145474121) 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 7 ways as a sum of consecutive naturals, for example, 1132845 + ... + 1189801.

It is an arithmetic number, because the mean of its divisors is an integer number (8444593080).

Almost surely, 2^66145474111 is an apocalyptic number.

66145474111 is a deficient number, since it is larger than the sum of its proper divisors (1411270529).

66145474111 is a wasteful number, since it uses less digits than its factorization.

66145474111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81713.

The product of its digits is 80640, while the sum is 40.

The spelling of 66145474111 in words is "sixty-six billion, one hundred forty-five million, four hundred seventy-four thousand, one hundred eleven".