366660647209 has 2 divisors, whose sum is σ = 366660647210. Its totient is φ = 366660647208.

The previous prime is 366660647179. The next prime is 366660647261. The reversal of 366660647209 is 902746066663.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 217720226025 + 148940421184 = 466605^2 + 385928^2 .

It is a cyclic number.

It is not a de Polignac number, because 366660647209 - 2¹¹ = 366660645161 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 366660647209.

It is not a weakly prime, because it can be changed into another prime (366660647909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 183330323604 + 183330323605.

It is an arithmetic number, because the mean of its divisors is an integer number (183330323605).

Almost surely, 2^366660647209 is an apocalyptic number.

It is an amenable number.

366660647209 is a deficient number, since it is larger than the sum of its proper divisors (1).

366660647209 is an equidigital number, since it uses as much as digits as its factorization.

366660647209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11757312, while the sum is 55.

The spelling of 366660647209 in words is "three hundred sixty-six billion, six hundred sixty million, six hundred forty-seven thousand, two hundred nine".