65744172 has 72 divisors (see below), whose sum is σ = 182080080. Its totient is φ = 19877760.

The previous prime is 65744171. The next prime is 65744177. The reversal of 65744172 is 27144756.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (65744171) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26422 + ... + 28802.

It is an arithmetic number, because the mean of its divisors is an integer number (2528890).

Almost surely, 2^65744172 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 65744172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91040040).

65744172 is an abundant number, since it is smaller than the sum of its proper divisors (116335908).

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

65744172 is a wasteful number, since it uses less digits than its factorization.

65744172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2463 (or 2458 counting only the distinct ones).

The product of its digits is 47040, while the sum is 36.

The square root of 65744172 is about 8108.2779922743. The cubic root of 65744172 is about 403.6011732497.

The spelling of 65744172 in words is "sixty-five million, seven hundred forty-four thousand, one hundred seventy-two".