6643546453466 has 8 divisors (see below), whose sum is σ = 10731882732564. Its totient is φ = 3066252209280.

The previous prime is 6643546453429. The next prime is 6643546453471.

6643546453466 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 2 ways, for example, as 6118325925625 + 525220527841 = 2473525^2 + 724721^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 6643546453399 and 6643546453408.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 127760508695 + ... + 127760508746.

Almost surely, 2^{6643546453466} is an apocalyptic number.

6643546453466 is a deficient number, since it is larger than the sum of its proper divisors (4088336279098).

6643546453466 is a wasteful number, since it uses less digits than its factorization.

6643546453466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255521017456.

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

The spelling of 6643546453466 in words is "six trillion, six hundred forty-three billion, five hundred forty-six million, four hundred fifty-three thousand, four hundred sixty-six".