65994072240 has 160 divisors (see below), whose sum is σ = 211722448896. Its totient is φ = 16987069440.

The previous prime is 65994072239. The next prime is 65994072253. The reversal of 65994072240 is 4227049956.

65994072240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 65994072240.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2942509 + ... + 2964851.

Almost surely, 2^65994072240 is an apocalyptic number.

65994072240 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 65994072240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105861224448).

65994072240 is an abundant number, since it is smaller than the sum of its proper divisors (145728376656).

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

65994072240 is a wasteful number, since it uses less digits than its factorization.

65994072240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22787 (or 22781 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 48.

The spelling of 65994072240 in words is "sixty-five billion, nine hundred ninety-four million, seventy-two thousand, two hundred forty".