65066474440 has 64 divisors (see below), whose sum is σ = 159902631360. Its totient is φ = 23631793920.

The previous prime is 65066474423. The next prime is 65066474449. The reversal of 65066474440 is 4447466056.

65066474440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (65066474449) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 274474 + ... + 453286.

It is an arithmetic number, because the mean of its divisors is an integer number (2498478615).

Almost surely, 2^65066474440 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 65066474440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79951315680).

65066474440 is an abundant number, since it is smaller than the sum of its proper divisors (94836156920).

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

65066474440 is a wasteful number, since it uses less digits than its factorization.

65066474440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179662 (or 179658 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 46.

The spelling of 65066474440 in words is "sixty-five billion, sixty-six million, four hundred seventy-four thousand, four hundred forty".