66701427197217 has 8 divisors (see below), whose sum is σ = 88935274467840. Its totient is φ = 44467599029040.

The previous prime is 66701427197183. The next prime is 66701427197291. The reversal of 66701427197217 is 71279172410766.

It is a happy number.

66701427197217 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 66701427197217 - 2²⁸ = 66701158761761 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66701427197117) 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, 9290467 + ... + 14822807.

It is an arithmetic number, because the mean of its divisors is an integer number (11116909308480).

Almost surely, 2^{66701427197217} is an apocalyptic number.

It is an amenable number.

66701427197217 is a deficient number, since it is larger than the sum of its proper divisors (22233847270623).

66701427197217 is a wasteful number, since it uses less digits than its factorization.

66701427197217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9551223.

The product of its (nonzero) digits is 12446784, while the sum is 60.

The spelling of 66701427197217 in words is "sixty-six trillion, seven hundred one billion, four hundred twenty-seven million, one hundred ninety-seven thousand, two hundred seventeen".