6466628266646 has 16 divisors (see below), whose sum is σ = 10277625132576. Its totient is φ = 3041016107136.

The previous prime is 6466628266643. The next prime is 6466628266673.

It is a happy number.

6466628266646 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×6466628266646² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6466628266643) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 65671241 + ... + 65769636.

It is an arithmetic number, because the mean of its divisors is an integer number (642351570786).

Almost surely, 2^{6466628266646} is an apocalyptic number.

6466628266646 is a deficient number, since it is larger than the sum of its proper divisors (3810996865930).

6466628266646 is a wasteful number, since it uses less digits than its factorization.

6466628266646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131442343.

The product of its digits is 859963392, while the sum is 68.

The spelling of 6466628266646 in words is "six trillion, four hundred sixty-six billion, six hundred twenty-eight million, two hundred sixty-six thousand, six hundred forty-six".