664346643466 has 32 divisors (see below), whose sum is σ = 1181243013120. Its totient is φ = 276853820400.

The previous prime is 664346643461. The next prime is 664346643533.

664346643466 is nontrivially palindromic in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 664346643466.

It is not an unprimeable number, because it can be changed into a prime (664346643461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25621656 + ... + 25647571.

It is an arithmetic number, because the mean of its divisors is an integer number (36913844160).

Almost surely, 2^664346643466 is an apocalyptic number.

664346643466 is a deficient number, since it is larger than the sum of its proper divisors (516896369654).

664346643466 is a wasteful number, since it uses less digits than its factorization.

664346643466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51269290.

The product of its digits is 107495424, while the sum is 58.

The spelling of 664346643466 in words is "six hundred sixty-four billion, three hundred forty-six million, six hundred forty-three thousand, four hundred sixty-six".