65840012 has 24 divisors (see below), whose sum is σ = 131878656. Its totient is φ = 28174608.

The previous prime is 65840003. The next prime is 65840039. The reversal of 65840012 is 21004856.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23393 + ... + 26055.

It is an arithmetic number, because the mean of its divisors is an integer number (5494944).

Almost surely, 2^65840012 is an apocalyptic number.

It is an amenable number.

65840012 is an abundant number, since it is smaller than the sum of its proper divisors (66038644).

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

65840012 is a wasteful number, since it uses less digits than its factorization.

65840012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3557 (or 3555 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 65840012 is about 8114.1858494861. The cubic root of 65840012 is about 403.7971974973.

Adding to 65840012 its reverse (21004856), we get a palindrome (86844868).

The spelling of 65840012 in words is "sixty-five million, eight hundred forty thousand, twelve".