36666697637 has 2 divisors, whose sum is σ = 36666697638. Its totient is φ = 36666697636.

The previous prime is 36666697597. The next prime is 36666697643. The reversal of 36666697637 is 73679666663.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26512306276 + 10154391361 = 162826^2 + 100769^2 .

It is a cyclic number.

It is not a de Polignac number, because 36666697637 - 2¹⁰ = 36666696613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (36666697337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18333348818 + 18333348819.

It is an arithmetic number, because the mean of its divisors is an integer number (18333348819).

Almost surely, 2^36666697637 is an apocalyptic number.

It is an amenable number.

36666697637 is a deficient number, since it is larger than the sum of its proper divisors (1).

36666697637 is an equidigital number, since it uses as much as digits as its factorization.

36666697637 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 185177664, while the sum is 65.

The spelling of 36666697637 in words is "thirty-six billion, six hundred sixty-six million, six hundred ninety-seven thousand, six hundred thirty-seven".