65372720 has 80 divisors (see below), whose sum is σ = 175488768. Its totient is φ = 22183680.

The previous prime is 65372689. The next prime is 65372729. The reversal of 65372720 is 2727356.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (65372729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59375 + ... + 60465.

Almost surely, 2^65372720 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 65372720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87744384).

65372720 is an abundant number, since it is smaller than the sum of its proper divisors (110116048).

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

65372720 is a wasteful number, since it uses less digits than its factorization.

65372720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1218 (or 1212 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 32.

The square root of 65372720 is about 8085.3398196984. The cubic root of 65372720 is about 402.8396269279.

The spelling of 65372720 in words is "sixty-five million, three hundred seventy-two thousand, seven hundred twenty".