664442433732264 has 32 divisors (see below), whose sum is σ = 1812115728361440. Its totient is φ = 201346192040000.

The previous prime is 664442433732263. The next prime is 664442433732269. The reversal of 664442433732264 is 462237334244466.

It is a junction number, because it is equal to n+sod(n) for n = 664442433732198 and 664442433732207.

It is not an unprimeable number, because it can be changed into a prime (664442433732263) 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, 1258413699987 + ... + 1258413700514.

It is an arithmetic number, because the mean of its divisors is an integer number (56628616511295).

Almost surely, 2^{664442433732264} is an apocalyptic number.

It is an amenable number.

664442433732264 is an abundant number, since it is smaller than the sum of its proper divisors (1147673294629176).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

664442433732264 is a wasteful number, since it uses less digits than its factorization.

664442433732264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2516827400521 (or 2516827400517 counting only the distinct ones).

The product of its digits is 334430208, while the sum is 60.

The spelling of 664442433732264 in words is "six hundred sixty-four trillion, four hundred forty-two billion, four hundred thirty-three million, seven hundred thirty-two thousand, two hundred sixty-four".