65716672 has 42 divisors (see below), whose sum is σ = 149426168. Its totient is φ = 28090752.

The previous prime is 65716667. The next prime is 65716691. The reversal of 65716672 is 27661756.

It is a happy number.

Its product of digits (105840) is a multiple of the sum of its prime divisors (392).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 171393 + ... + 171775.

Almost surely, 2^65716672 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 65716672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74713084).

65716672 is an abundant number, since it is smaller than the sum of its proper divisors (83709496).

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

65716672 is an frugal number, since it uses more digits than its factorization.

65716672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 785 (or 392 counting only the distinct ones).

The product of its digits is 105840, while the sum is 40.

The square root of 65716672 is about 8106.5820171019. The cubic root of 65716672 is about 403.5448915555.

The spelling of 65716672 in words is "sixty-five million, seven hundred sixteen thousand, six hundred seventy-two".