664143635242324 has 6 divisors (see below), whose sum is σ = 1162251361674074. Its totient is φ = 332071817621160.

The previous prime is 664143635242301. The next prime is 664143635242361. The reversal of 664143635242324 is 423242536341466.

It can be written as a sum of positive squares in only one way, i.e., 407718883202500 + 256424752039824 = 20192050^2 + 16013268^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83017954405287 + ... + 83017954405294.

Almost surely, 2^{664143635242324} is an apocalyptic number.

It is an amenable number.

664143635242324 is a deficient number, since it is larger than the sum of its proper divisors (498107726431750).

664143635242324 is a wasteful number, since it uses less digits than its factorization.

664143635242324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166035908810585 (or 166035908810583 counting only the distinct ones).

The product of its digits is 59719680, while the sum is 55.

The spelling of 664143635242324 in words is "six hundred sixty-four trillion, one hundred forty-three billion, six hundred thirty-five million, two hundred forty-two thousand, three hundred twenty-four".