664391300416 has 14 divisors (see below), whose sum is σ = 1318401486890. Its totient is φ = 332195650176.

The previous prime is 664391300411. The next prime is 664391300431. The reversal of 664391300416 is 614003193466.

It can be written as a sum of positive squares in only one way, i.e., 576846326016 + 87544974400 = 759504^2 + 295880^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664391300411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5190556971 + ... + 5190557098.

Almost surely, 2^664391300416 is an apocalyptic number.

It is an amenable number.

664391300416 is a deficient number, since it is larger than the sum of its proper divisors (654010186474).

664391300416 is a wasteful number, since it uses less digits than its factorization.

664391300416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10381114081 (or 10381114071 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 43.

The spelling of 664391300416 in words is "six hundred sixty-four billion, three hundred ninety-one million, three hundred thousand, four hundred sixteen".