664567633246372 has 24 divisors (see below), whose sum is σ = 1176074232996600. Its totient is φ = 328546509747456.

The previous prime is 664567633246351. The next prime is 664567633246373. The reversal of 664567633246372 is 273642336765466.

It can be written as a sum of positive squares in 4 ways, for example, as 28287995273316 + 636279637973056 = 5318646^2 + 25224584^2 .

It is not an unprimeable number, because it can be changed into a prime (664567633246373) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20364654 + ... + 41759482.

It is an arithmetic number, because the mean of its divisors is an integer number (49003093041525).

Almost surely, 2^{664567633246372} is an apocalyptic number.

It is an amenable number.

664567633246372 is a deficient number, since it is larger than the sum of its proper divisors (511506599750228).

664567633246372 is a wasteful number, since it uses less digits than its factorization.

664567633246372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21482175 (or 21482173 counting only the distinct ones).

The product of its digits is 3292047360, while the sum is 70.

The spelling of 664567633246372 in words is "six hundred sixty-four trillion, five hundred sixty-seven billion, six hundred thirty-three million, two hundred forty-six thousand, three hundred seventy-two".