664776770715364 has 6 divisors (see below), whose sum is σ = 1163359348751894. Its totient is φ = 332388385357680.

The previous prime is 664776770715289. The next prime is 664776770715367. The reversal of 664776770715364 is 463517077677466.

It can be written as a sum of positive squares in only one way, i.e., 639984756326400 + 24792014388964 = 25297920^2 + 4979158^2 .

It is not an unprimeable number, because it can be changed into a prime (664776770715367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83097096339417 + ... + 83097096339424.

Almost surely, 2^{664776770715364} is an apocalyptic number.

It is an amenable number.

664776770715364 is a deficient number, since it is larger than the sum of its proper divisors (498582578036530).

664776770715364 is a wasteful number, since it uses less digits than its factorization.

664776770715364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166194192678845 (or 166194192678843 counting only the distinct ones).

The product of its (nonzero) digits is 5227649280, while the sum is 76.

The spelling of 664776770715364 in words is "six hundred sixty-four trillion, seven hundred seventy-six billion, seven hundred seventy million, seven hundred fifteen thousand, three hundred sixty-four".