6644536354466 has 4 divisors (see below), whose sum is σ = 9966804531702. Its totient is φ = 3322268177232.

The previous prime is 6644536354439. The next prime is 6644536354537.

6644536354466 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 6641676351025 + 2860003441 = 2577145^2 + 53479^2 .

It is a junction number, because it is equal to n+sod(n) for n = 6644536354399 and 6644536354408.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1661134088615 + ... + 1661134088618.

Almost surely, 2^{6644536354466} is an apocalyptic number.

6644536354466 is a deficient number, since it is larger than the sum of its proper divisors (3322268177236).

6644536354466 is a wasteful number, since it uses less digits than its factorization.

6644536354466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3322268177235.

The product of its digits is 447897600, while the sum is 62.

The spelling of 6644536354466 in words is "six trillion, six hundred forty-four billion, five hundred thirty-six million, three hundred fifty-four thousand, four hundred sixty-six".