65698256671 has 4 divisors (see below), whose sum is σ = 65699775000. Its totient is φ = 65696738344.

The previous prime is 65698256669. The next prime is 65698256681. The reversal of 65698256671 is 17665289656.

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

It is a cyclic number.

It is not a de Polignac number, because 65698256671 - 2¹ = 65698256669 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65698256681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 692296 + ... + 781453.

It is an arithmetic number, because the mean of its divisors is an integer number (16424943750).

Almost surely, 2^65698256671 is an apocalyptic number.

65698256671 is a deficient number, since it is larger than the sum of its proper divisors (1518329).

65698256671 is a wasteful number, since it uses less digits than its factorization.

65698256671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1518328.

The product of its digits is 32659200, while the sum is 61.

The spelling of 65698256671 in words is "sixty-five billion, six hundred ninety-eight million, two hundred fifty-six thousand, six hundred seventy-one".