36666670336661 has 2 divisors, whose sum is σ = 36666670336662. Its totient is φ = 36666670336660.

The previous prime is 36666670336651. The next prime is 36666670336823. The reversal of 36666670336661 is 16663307666663.

It is a happy number.

36666670336661 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., 19161902159761 + 17504768176900 = 4377431^2 + 4183870^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-36666670336661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (36666670336651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18333335168330 + 18333335168331.

It is an arithmetic number, because the mean of its divisors is an integer number (18333335168331).

Almost surely, 2^{36666670336661} is an apocalyptic number.

It is an amenable number.

36666670336661 is a deficient number, since it is larger than the sum of its proper divisors (1).

36666670336661 is an equidigital number, since it uses as much as digits as its factorization.

36666670336661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 317447424, while the sum is 65.

The spelling of 36666670336661 in words is "thirty-six trillion, six hundred sixty-six billion, six hundred seventy million, three hundred thirty-six thousand, six hundred sixty-one".