664581546606 has 16 divisors (see below), whose sum is σ = 1329171335424. Its totient is φ = 221525808504.

The previous prime is 664581546593. The next prime is 664581546611. The reversal of 664581546606 is 606645185466.

664581546606 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×664581546606³ (a number of 36 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1338171 + ... + 1766313.

It is an arithmetic number, because the mean of its divisors is an integer number (83073208464).

Almost surely, 2^664581546606 is an apocalyptic number.

664581546606 is an abundant number, since it is smaller than the sum of its proper divisors (664589788818).

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

664581546606 is a wasteful number, since it uses less digits than its factorization.

664581546606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 686855.

The product of its (nonzero) digits is 24883200, while the sum is 57.

The spelling of 664581546606 in words is "six hundred sixty-four billion, five hundred eighty-one million, five hundred forty-six thousand, six hundred six".