666261662030053 has 2 divisors, whose sum is σ = 666261662030054. Its totient is φ = 666261662030052.

The previous prime is 666261662030047. The next prime is 666261662030077. The reversal of 666261662030053 is 350030266162666.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 479006713433284 + 187254948596769 = 21886222^2 + 13684113^2 .

It is a cyclic number.

It is not a de Polignac number, because 666261662030053 - 2¹³ = 666261662021861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (666261662033053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333130831015026 + 333130831015027.

It is an arithmetic number, because the mean of its divisors is an integer number (333130831015027).

Almost surely, 2^{666261662030053} is an apocalyptic number.

It is an amenable number.

666261662030053 is a deficient number, since it is larger than the sum of its proper divisors (1).

666261662030053 is an equidigital number, since it uses as much as digits as its factorization.

666261662030053 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8398080, while the sum is 52.

The spelling of 666261662030053 in words is "six hundred sixty-six trillion, two hundred sixty-one billion, six hundred sixty-two million, thirty thousand, fifty-three".