65685174989 has 4 divisors (see below), whose sum is σ = 75068771424. Its totient is φ = 56301578556.

The previous prime is 65685174959. The next prime is 65685175001. The reversal of 65685174989 is 98947158656.

It is a happy number.

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 65685174989 - 2⁸ = 65685174733 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 (65685174959) 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, 4691798207 + ... + 4691798220.

It is an arithmetic number, because the mean of its divisors is an integer number (18767192856).

Almost surely, 2^65685174989 is an apocalyptic number.

It is an amenable number.

65685174989 is a deficient number, since it is larger than the sum of its proper divisors (9383596435).

65685174989 is an equidigital number, since it uses as much as digits as its factorization.

65685174989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9383596434.

The product of its digits is 130636800, while the sum is 68.

The spelling of 65685174989 in words is "sixty-five billion, six hundred eighty-five million, one hundred seventy-four thousand, nine hundred eighty-nine".