65648823 has 4 divisors (see below), whose sum is σ = 87531768. Its totient is φ = 43765880.

The previous prime is 65648813. The next prime is 65648861. The reversal of 65648823 is 32884656.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65648823 is a prime.

It is a super-2 number, since 2×65648823² = 8619535922570658, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65648813) 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, 10941468 + ... + 10941473.

It is an arithmetic number, because the mean of its divisors is an integer number (21882942).

Almost surely, 2^65648823 is an apocalyptic number.

65648823 is a deficient number, since it is larger than the sum of its proper divisors (21882945).

65648823 is a wasteful number, since it uses less digits than its factorization.

65648823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21882944.

The product of its digits is 276480, while the sum is 42.

The square root of 65648823 is about 8102.3961270725. The cubic root of 65648823 is about 403.4059641227.

The spelling of 65648823 in words is "sixty-five million, six hundred forty-eight thousand, eight hundred twenty-three".