65321872 has 80 divisors (see below), whose sum is σ = 162168192. Its totient is φ = 24744960.

The previous prime is 65321849. The next prime is 65321881. The reversal of 65321872 is 27812356.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44868 + ... + 46300.

Almost surely, 2^65321872 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 65321872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81084096).

65321872 is an abundant number, since it is smaller than the sum of its proper divisors (96846320).

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

65321872 is a wasteful number, since it uses less digits than its factorization.

65321872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1496 (or 1490 counting only the distinct ones).

The product of its digits is 20160, while the sum is 34.

The square root of 65321872 is about 8082.1947514274. The cubic root of 65321872 is about 402.7351546931.

The spelling of 65321872 in words is "sixty-five million, three hundred twenty-one thousand, eight hundred seventy-two".