66363724201 has 2 divisors, whose sum is σ = 66363724202. Its totient is φ = 66363724200.

The previous prime is 66363724183. The next prime is 66363724237. The reversal of 66363724201 is 10242736366.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55590322176 + 10773402025 = 235776^2 + 103795^2 .

It is a cyclic number.

It is not a de Polignac number, because 66363724201 - 2²¹ = 66361627049 is a prime.

It is not a weakly prime, because it can be changed into another prime (66363724901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33181862100 + 33181862101.

It is an arithmetic number, because the mean of its divisors is an integer number (33181862101).

Almost surely, 2^66363724201 is an apocalyptic number.

It is an amenable number.

66363724201 is a deficient number, since it is larger than the sum of its proper divisors (1).

66363724201 is an equidigital number, since it uses as much as digits as its factorization.

66363724201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 217728, while the sum is 40.

The spelling of 66363724201 in words is "sixty-six billion, three hundred sixty-three million, seven hundred twenty-four thousand, two hundred one".