664131446 has 16 divisors (see below), whose sum is σ = 1107267408. Its totient is φ = 296181600.

The previous prime is 664131427. The next prime is 664131451. The reversal of 664131446 is 644131466.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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, 283625 + ... + 285956.

It is an arithmetic number, because the mean of its divisors is an integer number (69204213).

Almost surely, 2^664131446 is an apocalyptic number.

664131446 is a deficient number, since it is larger than the sum of its proper divisors (443135962).

664131446 is a wasteful number, since it uses less digits than its factorization.

664131446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 569647.

The product of its digits is 41472, while the sum is 35.

The square root of 664131446 is about 25770.7478742857. The cubic root of 664131446 is about 872.4716984386.

The spelling of 664131446 in words is "six hundred sixty-four million, one hundred thirty-one thousand, four hundred forty-six".