6644111674 has 4 divisors (see below), whose sum is σ = 9966167514. Its totient is φ = 3322055836.

The previous prime is 6644111629. The next prime is 6644111693. The reversal of 6644111674 is 4761114466.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4761114466 = 2 ⋅2380557233.

It can be written as a sum of positive squares in only one way, i.e., 6618961449 + 25150225 = 81357^2 + 5015^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1661027917 + ... + 1661027920.

Almost surely, 2^6644111674 is an apocalyptic number.

6644111674 is a deficient number, since it is larger than the sum of its proper divisors (3322055840).

6644111674 is a wasteful number, since it uses less digits than its factorization.

6644111674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3322055839.

The product of its digits is 96768, while the sum is 40.

The square root of 6644111674 is about 81511.4205127110. The cubic root of 6644111674 is about 1879.9471535243.

The spelling of 6644111674 in words is "six billion, six hundred forty-four million, one hundred eleven thousand, six hundred seventy-four".