36666666649 has 2 divisors, whose sum is σ = 36666666650. Its totient is φ = 36666666648.

The previous prime is 36666666643. The next prime is 36666666683. The reversal of 36666666649 is 94666666663.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22009206025 + 14657460624 = 148355^2 + 121068^2 .

It is an emirp because it is prime and its reverse (94666666663) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 36666666649 - 2⁹ = 36666666137 is a prime.

It is not a weakly prime, because it can be changed into another prime (36666666643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18333333324 + 18333333325.

It is an arithmetic number, because the mean of its divisors is an integer number (18333333325).

Almost surely, 2^36666666649 is an apocalyptic number.

It is an amenable number.

36666666649 is a deficient number, since it is larger than the sum of its proper divisors (1).

36666666649 is an equidigital number, since it uses as much as digits as its factorization.

36666666649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 181398528, while the sum is 64.

The spelling of 36666666649 in words is "thirty-six billion, six hundred sixty-six million, six hundred sixty-six thousand, six hundred forty-nine".