6646434346466 has 16 divisors (see below), whose sum is σ = 10271897874168. Its totient is φ = 3223960963200.

The previous prime is 6646434346463. The next prime is 6646434346609.

6646434346466 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 4 ways, for example, as 5598310905625 + 1048123440841 = 2366075^2 + 1023779^2 .

It is a Smith number, since the sum of its digits (62) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 6646434346399 and 6646434346408.

It is not an unprimeable number, because it can be changed into a prime (6646434346463) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 373134725 + ... + 373152536.

Almost surely, 2^{6646434346466} is an apocalyptic number.

6646434346466 is a deficient number, since it is larger than the sum of its proper divisors (3625463527702).

6646434346466 is a wasteful number, since it uses less digits than its factorization.

6646434346466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 746287397.

The product of its digits is 429981696, while the sum is 62.

The spelling of 6646434346466 in words is "six trillion, six hundred forty-six billion, four hundred thirty-four million, three hundred forty-six thousand, four hundred sixty-six".