65500140 has 48 divisors (see below), whose sum is σ = 187310592. Its totient is φ = 17094336.

The previous prime is 65500139. The next prime is 65500151. The reversal of 65500140 is 4100556.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8794 + ... + 14433.

It is an arithmetic number, because the mean of its divisors is an integer number (3902304).

Almost surely, 2^65500140 is an apocalyptic number.

65500140 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

65500140 is an abundant number, since it is smaller than the sum of its proper divisors (121810452).

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

65500140 is a wasteful number, since it uses less digits than its factorization.

65500140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23286 (or 23284 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 65500140 is about 8093.2156773436. The cubic root of 65500140 is about 403.1011861421.

Adding to 65500140 its reverse (4100556), we get a palindrome (69600696).

The spelling of 65500140 in words is "sixty-five million, five hundred thousand, one hundred forty".