664600624244 has 12 divisors (see below), whose sum is σ = 1163318061444. Its totient is φ = 332224035264.

The previous prime is 664600624241. The next prime is 664600624277. The reversal of 664600624244 is 442426006466.

It can be written as a sum of positive squares in 2 ways, for example, as 404735171344 + 259865452900 = 636188^2 + 509770^2 .

It is a junction number, because it is equal to n+sod(n) for n = 664600624195 and 664600624204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664600624241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19049609 + ... + 19084464.

It is an arithmetic number, because the mean of its divisors is an integer number (96943171787).

Almost surely, 2^664600624244 is an apocalyptic number.

It is an amenable number.

664600624244 is a deficient number, since it is larger than the sum of its proper divisors (498717437200).

664600624244 is a wasteful number, since it uses less digits than its factorization.

664600624244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38138434 (or 38138432 counting only the distinct ones).

The product of its (nonzero) digits is 1327104, while the sum is 44.

The spelling of 664600624244 in words is "six hundred sixty-four billion, six hundred million, six hundred twenty-four thousand, two hundred forty-four".