65997792 has 144 divisors (see below), whose sum is σ = 225912960. Its totient is φ = 17853696.

The previous prime is 65997779. The next prime is 65997793. The reversal of 65997792 is 29779956.

It is a tau number, because it is divible by the number of its divisors (144).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65997793) 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, 37443 + ... + 39165.

It is an arithmetic number, because the mean of its divisors is an integer number (1568840).

Almost surely, 2^65997792 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 65997792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (112956480).

65997792 is an abundant number, since it is smaller than the sum of its proper divisors (159915168).

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

65997792 is a wasteful number, since it uses less digits than its factorization.

65997792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1765 (or 1754 counting only the distinct ones).

The product of its digits is 2143260, while the sum is 54.

The square root of 65997792 is about 8123.9025104933. The cubic root of 65997792 is about 404.1194954170.

The spelling of 65997792 in words is "sixty-five million, nine hundred ninety-seven thousand, seven hundred ninety-two".