65801340 has 144 divisors (see below), whose sum is σ = 220147200. Its totient is φ = 15776640.

The previous prime is 65801327. The next prime is 65801341. The reversal of 65801340 is 4310856.

65801340 is a `hidden beast` number, since 658 + 0 + 1 + 3 + 4 + 0 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65801341) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 330561 + ... + 330759.

It is an arithmetic number, because the mean of its divisors is an integer number (1528800).

Almost surely, 2^65801340 is an apocalyptic number.

65801340 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 65801340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (110073600).

65801340 is an abundant number, since it is smaller than the sum of its proper divisors (154345860).

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

65801340 is a wasteful number, since it uses less digits than its factorization.

65801340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392 (or 387 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 65801340 is about 8111.8025123890. The cubic root of 65801340 is about 403.7181234758.

The spelling of 65801340 in words is "sixty-five million, eight hundred one thousand, three hundred forty".