665064079201 has 2 divisors, whose sum is σ = 665064079202. Its totient is φ = 665064079200.

The previous prime is 665064079187. The next prime is 665064079231. The reversal of 665064079201 is 102970460566.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 571118764176 + 93945315025 = 755724^2 + 306505^2 .

It is a cyclic number.

It is not a de Polignac number, because 665064079201 - 2⁹ = 665064078689 is a prime.

It is not a weakly prime, because it can be changed into another prime (665064079231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332532039600 + 332532039601.

It is an arithmetic number, because the mean of its divisors is an integer number (332532039601).

Almost surely, 2^665064079201 is an apocalyptic number.

It is an amenable number.

665064079201 is a deficient number, since it is larger than the sum of its proper divisors (1).

665064079201 is an equidigital number, since it uses as much as digits as its factorization.

665064079201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 544320, while the sum is 46.

The spelling of 665064079201 in words is "six hundred sixty-five billion, sixty-four million, seventy-nine thousand, two hundred one".