65316661357 has 4 divisors (see below), whose sum is σ = 65317724956. Its totient is φ = 65315597760.

The previous prime is 65316661351. The next prime is 65316661373. The reversal of 65316661357 is 75316661356.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 23820526921 + 41496134436 = 154339^2 + 203706^2 .

It is a cyclic number.

It is not a de Polignac number, because 65316661357 - 2³ = 65316661349 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 65316661357.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65316661351) 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 in 3 ways as a sum of consecutive naturals, for example, 433644 + ... + 564517.

It is an arithmetic number, because the mean of its divisors is an integer number (16329431239).

Almost surely, 2^65316661357 is an apocalyptic number.

It is an amenable number.

65316661357 is a deficient number, since it is larger than the sum of its proper divisors (1063599).

65316661357 is an equidigital number, since it uses as much as digits as its factorization.

65316661357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1063598.

The product of its digits is 2041200, while the sum is 49.

Subtracting 65316661357 from its reverse (75316661356), we obtain a palindrome (9999999999).

The spelling of 65316661357 in words is "sixty-five billion, three hundred sixteen million, six hundred sixty-one thousand, three hundred fifty-seven".