65945760 has 48 divisors (see below), whose sum is σ = 207730656. Its totient is φ = 17585408.

The previous prime is 65945743. The next prime is 65945779. The reversal of 65945760 is 6754956.

It is a tau number, because it is divible by the number of its divisors (48).

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 68214 + ... + 69173.

It is an arithmetic number, because the mean of its divisors is an integer number (4327722).

Almost surely, 2^65945760 is an apocalyptic number.

65945760 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

65945760 is an abundant number, since it is smaller than the sum of its proper divisors (141784896).

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

65945760 is a wasteful number, since it uses less digits than its factorization.

65945760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137405 (or 137397 counting only the distinct ones).

The product of its (nonzero) digits is 226800, while the sum is 42.

The square root of 65945760 is about 8120.6994772618. The cubic root of 65945760 is about 404.0132662376.

The spelling of 65945760 in words is "sixty-five million, nine hundred forty-five thousand, seven hundred sixty".