65150640 has 120 divisors (see below), whose sum is σ = 224235648. Its totient is φ = 16942080.

The previous prime is 65150629. The next prime is 65150641. The reversal of 65150640 is 4605156.

It is a happy number.

65150640 is a `hidden beast` number, since 6 + 5 + 15 + 0 + 640 = 666.

65150640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (120).

It is not an unprimeable number, because it can be changed into a prime (65150641) 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 23 ways as a sum of consecutive naturals, for example, 28417 + ... + 30623.

Almost surely, 2^65150640 is an apocalyptic number.

65150640 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65150640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (112117824).

65150640 is an abundant number, since it is smaller than the sum of its proper divisors (159085008).

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

65150640 is a wasteful number, since it uses less digits than its factorization.

65150640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2267 (or 2258 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 65150640 is about 8071.5946379882. The cubic root of 65150640 is about 402.3829424397.

Adding to 65150640 its reverse (4605156), we get a palindrome (69755796).

The spelling of 65150640 in words is "sixty-five million, one hundred fifty thousand, six hundred forty".