65649 has 8 divisors (see below), whose sum is σ = 88960. Its totient is φ = 43056.

The previous prime is 65647. The next prime is 65651. The reversal of 65649 is 94656.

It is an interprime number because it is at equal distance from previous prime (65647) and next prime (65651).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 65649 - 2¹ = 65647 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99 + ... + 375.

It is an arithmetic number, because the mean of its divisors is an integer number (11120).

2⁶⁵⁶⁴⁹ is an apocalyptic number.

It is an amenable number.

65649 is a deficient number, since it is larger than the sum of its proper divisors (23311).

65649 is a wasteful number, since it uses less digits than its factorization.

65649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359.

The product of its digits is 6480, while the sum is 30.

The square root of 65649 is about 256.2206080705. The cubic root of 65649 is about 40.3406326672.

The spelling of 65649 in words is "sixty-five thousand, six hundred forty-nine".