662341621 has 2 divisors, whose sum is σ = 662341622. Its totient is φ = 662341620.

The previous prime is 662341619. The next prime is 662341627. The reversal of 662341621 is 126143266.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 485717521 + 176624100 = 22039^2 + 13290^2 .

It is a cyclic number.

It is not a de Polignac number, because 662341621 - 2¹ = 662341619 is a prime.

Together with 662341619, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (662341627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331170810 + 331170811.

It is an arithmetic number, because the mean of its divisors is an integer number (331170811).

Almost surely, 2^662341621 is an apocalyptic number.

It is an amenable number.

662341621 is a deficient number, since it is larger than the sum of its proper divisors (1).

662341621 is an equidigital number, since it uses as much as digits as its factorization.

662341621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 31.

The square root of 662341621 is about 25735.9985428971. The cubic root of 662341621 is about 871.6872269429.

Adding to 662341621 its reverse (126143266), we get a palindrome (788484887).

The spelling of 662341621 in words is "six hundred sixty-two million, three hundred forty-one thousand, six hundred twenty-one".