662521361 has 2 divisors, whose sum is σ = 662521362. Its totient is φ = 662521360.

The previous prime is 662521333. The next prime is 662521369. The reversal of 662521361 is 163125266.

662521361 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., 633025600 + 29495761 = 25160^2 + 5431^2 .

It is a cyclic number.

It is not a de Polignac number, because 662521361 - 2¹⁰ = 662520337 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (662521369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331260680 + 331260681.

It is an arithmetic number, because the mean of its divisors is an integer number (331260681).

Almost surely, 2^662521361 is an apocalyptic number.

It is an amenable number.

662521361 is a deficient number, since it is larger than the sum of its proper divisors (1).

662521361 is an equidigital number, since it uses as much as digits as its factorization.

662521361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12960, while the sum is 32.

The square root of 662521361 is about 25739.4903018688. The cubic root of 662521361 is about 871.7660698878.

The spelling of 662521361 in words is "six hundred sixty-two million, five hundred twenty-one thousand, three hundred sixty-one".