65951840 has 48 divisors (see below), whose sum is σ = 164983392. Its totient is φ = 24827904.

The previous prime is 65951839. The next prime is 65951843. The reversal of 65951840 is 4815956.

65951840 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 65951794 and 65951803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65951843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9404 + ... + 14843.

It is an arithmetic number, because the mean of its divisors is an integer number (3437154).

Almost surely, 2^65951840 is an apocalyptic number.

It is an amenable number.

65951840 is an abundant number, since it is smaller than the sum of its proper divisors (99031552).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65951840 is a wasteful number, since it uses less digits than its factorization.

65951840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24279 (or 24271 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 38.

The square root of 65951840 is about 8121.0738206225. The cubic root of 65951840 is about 404.0256821239.

The spelling of 65951840 in words is "sixty-five million, nine hundred fifty-one thousand, eight hundred forty".