65685749 has 4 divisors (see below), whose sum is σ = 65823360. Its totient is φ = 65548140.

The previous prime is 65685733. The next prime is 65685757. The reversal of 65685749 is 94758656.

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 65685749 - 2⁴ = 65685733 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 65685697 and 65685706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65685799) 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, 68087 + ... + 69044.

It is an arithmetic number, because the mean of its divisors is an integer number (16455840).

Almost surely, 2^65685749 is an apocalyptic number.

It is an amenable number.

65685749 is a deficient number, since it is larger than the sum of its proper divisors (137611).

65685749 is a wasteful number, since it uses less digits than its factorization.

65685749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137610.

The product of its digits is 1814400, while the sum is 50.

The square root of 65685749 is about 8104.6745153646. The cubic root of 65685749 is about 403.4815855677.

The spelling of 65685749 in words is "sixty-five million, six hundred eighty-five thousand, seven hundred forty-nine".