664702125251046 has 64 divisors (see below), whose sum is σ = 1399835111604480. Its totient is φ = 209836613162880.

The previous prime is 664702125250993. The next prime is 664702125251093. The reversal of 664702125251046 is 640152521207466.

It is a self number, because there is not a number n which added to its sum of digits gives 664702125251046.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 4609416781 + ... + 4609560983.

It is an arithmetic number, because the mean of its divisors is an integer number (21872423618820).

Almost surely, 2^{664702125251046} is an apocalyptic number.

664702125251046 is an abundant number, since it is smaller than the sum of its proper divisors (735132986353434).

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

664702125251046 is a wasteful number, since it uses less digits than its factorization.

664702125251046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157301.

The product of its (nonzero) digits is 4838400, while the sum is 51.

The spelling of 664702125251046 in words is "six hundred sixty-four trillion, seven hundred two billion, one hundred twenty-five million, two hundred fifty-one thousand, forty-six".