662408321 has 2 divisors, whose sum is σ = 662408322. Its totient is φ = 662408320.

The previous prime is 662408317. The next prime is 662408323. The reversal of 662408321 is 123804266.

662408321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 459630721 + 202777600 = 21439^2 + 14240^2 .

It is a cyclic number.

It is not a de Polignac number, because 662408321 - 2² = 662408317 is a prime.

Together with 662408323, 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 (662408323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331204160 + 331204161.

It is an arithmetic number, because the mean of its divisors is an integer number (331204161).

Almost surely, 2^662408321 is an apocalyptic number.

It is an amenable number.

662408321 is a deficient number, since it is larger than the sum of its proper divisors (1).

662408321 is an equidigital number, since it uses as much as digits as its factorization.

662408321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 662408321 is about 25737.2943605189. The cubic root of 662408321 is about 871.7164865599.

The spelling of 662408321 in words is "six hundred sixty-two million, four hundred eight thousand, three hundred twenty-one".