65066540 has 144 divisors (see below), whose sum is σ = 180182016. Its totient is φ = 19282560.

The previous prime is 65066537. The next prime is 65066587. The reversal of 65066540 is 4566056.

65066540 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 = 65066497 and 65066506.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 389537 + ... + 389703.

It is an arithmetic number, because the mean of its divisors is an integer number (1251264).

Almost surely, 2^65066540 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65066540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90091008).

65066540 is an abundant number, since it is smaller than the sum of its proper divisors (115115476).

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

65066540 is a wasteful number, since it uses less digits than its factorization.

65066540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228 (or 215 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 32.

The square root of 65066540 is about 8066.3833283573. The cubic root of 65066540 is about 402.2097286032.

The spelling of 65066540 in words is "sixty-five million, sixty-six thousand, five hundred forty".