664843427732 has 24 divisors (see below), whose sum is σ = 1282331568000. Its totient is φ = 299086076160.

The previous prime is 664843427713. The next prime is 664843427749. The reversal of 664843427732 is 237724348466.

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, 77882732 + ... + 77891267.

It is an arithmetic number, because the mean of its divisors is an integer number (53430482000).

Almost surely, 2^664843427732 is an apocalyptic number.

It is an amenable number.

664843427732 is a deficient number, since it is larger than the sum of its proper divisors (617488140268).

664843427732 is a wasteful number, since it uses less digits than its factorization.

664843427732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155774111 (or 155774109 counting only the distinct ones).

The product of its digits is 32514048, while the sum is 56.

The spelling of 664843427732 in words is "six hundred sixty-four billion, eight hundred forty-three million, four hundred twenty-seven thousand, seven hundred thirty-two".