66447226671 has 16 divisors (see below), whose sum is σ = 101305906944. Its totient is φ = 37949972544.

The previous prime is 66447226627. The next prime is 66447226687. The reversal of 66447226671 is 17662274466.

It is not a de Polignac number, because 66447226671 - 2¹⁴ = 66447210287 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66447226271) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 786841 + ... + 867186.

It is an arithmetic number, because the mean of its divisors is an integer number (6331619184).

Almost surely, 2^66447226671 is an apocalyptic number.

66447226671 is a deficient number, since it is larger than the sum of its proper divisors (34858680273).

66447226671 is a wasteful number, since it uses less digits than its factorization.

66447226671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1655950.

The product of its digits is 4064256, while the sum is 51.

The spelling of 66447226671 in words is "sixty-six billion, four hundred forty-seven million, two hundred twenty-six thousand, six hundred seventy-one".