664046328750618 has 16 divisors (see below), whose sum is σ = 1448828353637856. Its totient is φ = 201226160227440.

The previous prime is 664046328750577. The next prime is 664046328750619. The reversal of 664046328750618 is 816057823640466.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (66), and also a Moran number because the ratio is a prime number: 10061308011373 = 664046328750618 / (6 + 6 + 4 + 0 + 4 + 6 + 3 + 2 + 8 + 7 + 5 + 0 + 6 + 1 + 8).

It is not an unprimeable number, because it can be changed into a prime (664046328750619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5030654005621 + ... + 5030654005752.

It is an arithmetic number, because the mean of its divisors is an integer number (90551772102366).

Almost surely, 2^{664046328750618} is an apocalyptic number.

664046328750618 is an abundant number, since it is smaller than the sum of its proper divisors (784782024887238).

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

664046328750618 is a wasteful number, since it uses less digits than its factorization.

664046328750618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10061308011389.

The product of its (nonzero) digits is 278691840, while the sum is 66.

The spelling of 664046328750618 in words is "six hundred sixty-four trillion, forty-six billion, three hundred twenty-eight million, seven hundred fifty thousand, six hundred eighteen".