66174244447 has 4 divisors (see below), whose sum is σ = 66174763320. Its totient is φ = 66173725576.

The previous prime is 66174244429. The next prime is 66174244453. The reversal of 66174244447 is 74444247166.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 66174244447 - 2³⁵ = 31814506079 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66174244447.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66174244547) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79233 + ... + 372325.

It is an arithmetic number, because the mean of its divisors is an integer number (16543690830).

Almost surely, 2^66174244447 is an apocalyptic number.

66174244447 is a deficient number, since it is larger than the sum of its proper divisors (518873).

66174244447 is a wasteful number, since it uses less digits than its factorization.

66174244447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 518872.

The product of its digits is 3612672, while the sum is 49.

The spelling of 66174244447 in words is "sixty-six billion, one hundred seventy-four million, two hundred forty-four thousand, four hundred forty-seven".