32666321 has 2 divisors, whose sum is σ = 32666322. Its totient is φ = 32666320.

The previous prime is 32666317. The next prime is 32666323. The reversal of 32666321 is 12366623.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28302400 + 4363921 = 5320^2 + 2089^2 .

It is an emirp because it is prime and its reverse (12366623) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 32666321 - 2² = 32666317 is a prime.

Together with 32666323, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (32666323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16333160 + 16333161.

It is an arithmetic number, because the mean of its divisors is an integer number (16333161).

Almost surely, 2^32666321 is an apocalyptic number.

It is an amenable number.

32666321 is a deficient number, since it is larger than the sum of its proper divisors (1).

32666321 is an equidigital number, since it uses as much as digits as its factorization.

32666321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7776, while the sum is 29.

The square root of 32666321 is about 5715.4458268800. The cubic root of 32666321 is about 319.6686707306.

The spelling of 32666321 in words is "thirty-two million, six hundred sixty-six thousand, three hundred twenty-one".