664441982 has 32 divisors (see below), whose sum is σ = 1044489600. Its totient is φ = 316742400.

The previous prime is 664441931. The next prime is 664442021. The reversal of 664441982 is 289144466.

It is a congruent number.

It is an unprimeable number.

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, 705632 + ... + 706572.

It is an arithmetic number, because the mean of its divisors is an integer number (32640300).

Almost surely, 2^664441982 is an apocalyptic number.

664441982 is a deficient number, since it is larger than the sum of its proper divisors (380047618).

664441982 is a wasteful number, since it uses less digits than its factorization.

664441982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1172.

The product of its digits is 331776, while the sum is 44.

The square root of 664441982 is about 25776.7721408248. The cubic root of 664441982 is about 872.6076613096.

The spelling of 664441982 in words is "six hundred sixty-four million, four hundred forty-one thousand, nine hundred eighty-two".