36666649 has 2 divisors, whose sum is σ = 36666650. Its totient is φ = 36666648.

The previous prime is 36666647. The next prime is 36666683. The reversal of 36666649 is 94666663.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21206025 + 15460624 = 4605^2 + 3932^2 .

It is a cyclic number.

It is not a de Polignac number, because 36666649 - 2¹ = 36666647 is a prime.

Together with 36666647, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 36666599 and 36666608.

It is not a weakly prime, because it can be changed into another prime (36666647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18333324 + 18333325.

It is an arithmetic number, because the mean of its divisors is an integer number (18333325).

Almost surely, 2^36666649 is an apocalyptic number.

It is an amenable number.

36666649 is a deficient number, since it is larger than the sum of its proper divisors (1).

36666649 is an equidigital number, since it uses as much as digits as its factorization.

36666649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 839808, while the sum is 46.

The square root of 36666649 is about 6055.2992494178. The cubic root of 36666649 is about 332.2184444479.

The spelling of 36666649 in words is "thirty-six million, six hundred sixty-six thousand, six hundred forty-nine".