366836666681 has 2 divisors, whose sum is σ = 366836666682. Its totient is φ = 366836666680.

The previous prime is 366836666657. The next prime is 366836666683. The reversal of 366836666681 is 186666638663.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 342118538281 + 24718128400 = 584909^2 + 157220^2 .

It is a cyclic number.

It is not a de Polignac number, because 366836666681 - 2⁶ = 366836666617 is a prime.

It is a super-2 number, since 2×366836666681² (a number of 24 digits) contains 22 as substring.

Together with 366836666683, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (366836666683) 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, 183418333340 + 183418333341.

It is an arithmetic number, because the mean of its divisors is an integer number (183418333341).

Almost surely, 2^366836666681 is an apocalyptic number.

It is an amenable number.

366836666681 is a deficient number, since it is larger than the sum of its proper divisors (1).

366836666681 is an equidigital number, since it uses as much as digits as its factorization.

366836666681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 161243136, while the sum is 65.

The spelling of 366836666681 in words is "three hundred sixty-six billion, eight hundred thirty-six million, six hundred sixty-six thousand, six hundred eighty-one".