665748202393 has 2 divisors, whose sum is σ = 665748202394. Its totient is φ = 665748202392.

The previous prime is 665748202373. The next prime is 665748202421. The reversal of 665748202393 is 393202847566.

665748202393 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 643030779664 + 22717422729 = 801892^2 + 150723^2 .

It is a cyclic number.

It is not a de Polignac number, because 665748202393 - 2³⁷ = 528309248921 is a prime.

It is not a weakly prime, because it can be changed into another prime (665748202363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332874101196 + 332874101197.

It is an arithmetic number, because the mean of its divisors is an integer number (332874101197).

Almost surely, 2^665748202393 is an apocalyptic number.

It is an amenable number.

665748202393 is a deficient number, since it is larger than the sum of its proper divisors (1).

665748202393 is an equidigital number, since it uses as much as digits as its factorization.

665748202393 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13063680, while the sum is 55.

The spelling of 665748202393 in words is "six hundred sixty-five billion, seven hundred forty-eight million, two hundred two thousand, three hundred ninety-three".