36666389 has 2 divisors, whose sum is σ = 36666390. Its totient is φ = 36666388.

The previous prime is 36666373. The next prime is 36666431. The reversal of 36666389 is 98366663.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36663025 + 3364 = 6055^2 + 58^2 .

It is an emirp because it is prime and its reverse (98366663) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 36666389 - 2⁴ = 36666373 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (36660389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18333194 + 18333195.

It is an arithmetic number, because the mean of its divisors is an integer number (18333195).

Almost surely, 2^36666389 is an apocalyptic number.

It is an amenable number.

36666389 is a deficient number, since it is larger than the sum of its proper divisors (1).

36666389 is an equidigital number, since it uses as much as digits as its factorization.

36666389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 839808, while the sum is 47.

The square root of 36666389 is about 6055.2777805812. The cubic root of 36666389 is about 332.2176592021.

The spelling of 36666389 in words is "thirty-six million, six hundred sixty-six thousand, three hundred eighty-nine".