663460121 has 2 divisors, whose sum is σ = 663460122. Its totient is φ = 663460120.

The previous prime is 663460097. The next prime is 663460123. The reversal of 663460121 is 121064366.

It is a happy number.

663460121 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., 451350025 + 212110096 = 21245^2 + 14564^2 .

It is a cyclic number.

It is not a de Polignac number, because 663460121 - 2²⁶ = 596351257 is a prime.

Together with 663460123, 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 (663460123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331730060 + 331730061.

It is an arithmetic number, because the mean of its divisors is an integer number (331730061).

Almost surely, 2^663460121 is an apocalyptic number.

It is an amenable number.

663460121 is a deficient number, since it is larger than the sum of its proper divisors (1).

663460121 is an equidigital number, since it uses as much as digits as its factorization.

663460121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 663460121 is about 25757.7196389743. The cubic root of 663460121 is about 872.1776253654.

The spelling of 663460121 in words is "six hundred sixty-three million, four hundred sixty thousand, one hundred twenty-one".