65260621 has 2 divisors, whose sum is σ = 65260622. Its totient is φ = 65260620.

The previous prime is 65260619. The next prime is 65260633. The reversal of 65260621 is 12606256.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64979721 + 280900 = 8061^2 + 530^2 .

It is a cyclic number.

It is not a de Polignac number, because 65260621 - 2¹ = 65260619 is a prime.

Together with 65260619, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 65260621.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65260651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32630310 + 32630311.

It is an arithmetic number, because the mean of its divisors is an integer number (32630311).

Almost surely, 2^65260621 is an apocalyptic number.

It is an amenable number.

65260621 is a deficient number, since it is larger than the sum of its proper divisors (1).

65260621 is an equidigital number, since it uses as much as digits as its factorization.

65260621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 65260621 is about 8078.4046073467. The cubic root of 65260621 is about 402.6092364545.

Adding to 65260621 its reverse (12606256), we get a palindrome (77866877).

The spelling of 65260621 in words is "sixty-five million, two hundred sixty thousand, six hundred twenty-one".