65997120 has 336 divisors, whose sum is σ = 258519168. Its totient is φ = 14192640.

The previous prime is 65997119. The next prime is 65997133. The reversal of 65997120 is 2179956.

It is a tau number, because it is divible by the number of its divisors (336).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1081890 + ... + 1081950.

Almost surely, 2^65997120 is an apocalyptic number.

65997120 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65997120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (129259584).

65997120 is an abundant number, since it is smaller than the sum of its proper divisors (192522048).

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

65997120 is a wasteful number, since it uses less digits than its factorization.

65997120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118 (or 101 counting only the distinct ones).

The product of its (nonzero) digits is 34020, while the sum is 39.

The square root of 65997120 is about 8123.8611509553. The cubic root of 65997120 is about 404.1181238094.

It can be divided in two parts, 659 and 97120, that added together give a palindrome (97779).

The spelling of 65997120 in words is "sixty-five million, nine hundred ninety-seven thousand, one hundred twenty".