65107920 has 80 divisors (see below), whose sum is σ = 204897600. Its totient is φ = 17098752.

The previous prime is 65107919. The next prime is 65107921. The reversal of 65107920 is 2970156.

It is an interprime number because it is at equal distance from previous prime (65107919) and next prime (65107921).

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

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65107921) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14056 + ... + 18104.

It is an arithmetic number, because the mean of its divisors is an integer number (2561220).

Almost surely, 2^65107920 is an apocalyptic number.

65107920 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 65107920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102448800).

65107920 is an abundant number, since it is smaller than the sum of its proper divisors (139789680).

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

65107920 is a wasteful number, since it uses less digits than its factorization.

65107920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4132 (or 4126 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 30.

The square root of 65107920 is about 8068.9478868066. The cubic root of 65107920 is about 402.2949742179.

The spelling of 65107920 in words is "sixty-five million, one hundred seven thousand, nine hundred twenty".