65937867697 has 4 divisors (see below), whose sum is σ = 71010011380. Its totient is φ = 60865724016.

The previous prime is 65937867679. The next prime is 65937867701. The reversal of 65937867697 is 79676873956.

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 38485022976 + 27452844721 = 196176^2 + 165689^2 .

It is a cyclic number.

It is not a de Polignac number, because 65937867697 - 2²⁷ = 65803649969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65937867397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2536071822 + ... + 2536071847.

It is an arithmetic number, because the mean of its divisors is an integer number (17752502845).

Almost surely, 2^65937867697 is an apocalyptic number.

It is an amenable number.

65937867697 is a deficient number, since it is larger than the sum of its proper divisors (5072143683).

65937867697 is a wasteful number, since it uses less digits than its factorization.

65937867697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5072143682.

The product of its digits is 720135360, while the sum is 73.

The spelling of 65937867697 in words is "sixty-five billion, nine hundred thirty-seven million, eight hundred sixty-seven thousand, six hundred ninety-seven".