36666647 has 2 divisors, whose sum is σ = 36666648. Its totient is φ = 36666646.

The previous prime is 36666631. The next prime is 36666649. The reversal of 36666647 is 74666663.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 36666647 - 2⁴ = 36666631 is a prime.

Together with 36666649, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 36666598 and 36666607.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (36666649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18333323 + 18333324.

It is an arithmetic number, because the mean of its divisors is an integer number (18333324).

Almost surely, 2^36666647 is an apocalyptic number.

36666647 is a deficient number, since it is larger than the sum of its proper divisors (1).

36666647 is an equidigital number, since it uses as much as digits as its factorization.

36666647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 653184, while the sum is 44.

The square root of 36666647 is about 6055.2990842732. The cubic root of 36666647 is about 332.2184384075.

The spelling of 36666647 in words is "thirty-six million, six hundred sixty-six thousand, six hundred forty-seven".