65103261661 has 4 divisors (see below), whose sum is σ = 65106385312. Its totient is φ = 65100138012.

The previous prime is 65103261623. The next prime is 65103261673. The reversal of 65103261661 is 16616230156.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 65103261661 - 2¹⁵ = 65103228893 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 65103261661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65103261161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1530351 + ... + 1572316.

It is an arithmetic number, because the mean of its divisors is an integer number (16276596328).

Almost surely, 2^65103261661 is an apocalyptic number.

It is an amenable number.

65103261661 is a deficient number, since it is larger than the sum of its proper divisors (3123651).

65103261661 is a wasteful number, since it uses less digits than its factorization.

65103261661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3123650.

The product of its (nonzero) digits is 38880, while the sum is 37.

The spelling of 65103261661 in words is "sixty-five billion, one hundred three million, two hundred sixty-one thousand, six hundred sixty-one".