664585646585466 has 16 divisors (see below), whose sum is σ = 1329184637985888. Its totient is φ = 221526324726000.

The previous prime is 664585646585461. The next prime is 664585646585467.

664585646585466 is nontrivially palindromic in base 10.

It is not an unprimeable number, because it can be changed into a prime (664585646585461) 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, 555386485 + ... + 556581816.

It is an arithmetic number, because the mean of its divisors is an integer number (83074039874118).

Almost surely, 2^{664585646585466} is an apocalyptic number.

664585646585466 is an abundant number, since it is smaller than the sum of its proper divisors (664598991400422).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

664585646585466 is a wasteful number, since it uses less digits than its factorization.

664585646585466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1112067917.

The product of its digits is 119439360000, while the sum is 84.

The spelling of 664585646585466 in words is "six hundred sixty-four trillion, five hundred eighty-five billion, six hundred forty-six million, five hundred eighty-five thousand, four hundred sixty-six".