65570 has 16 divisors (see below), whose sum is σ = 120960. Its totient is φ = 25584.

The previous prime is 65563. The next prime is 65579. The reversal of 65570 is 7556.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65579) by changing a digit.

65570 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (3) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 749 + ... + 831.

It is an arithmetic number, because the mean of its divisors is an integer number (7560).

2⁶⁵⁵⁷⁰ is an apocalyptic number.

65570 is a deficient number, since it is larger than the sum of its proper divisors (55390).

65570 is a wasteful number, since it uses less digits than its factorization.

65570 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169.

The product of its (nonzero) digits is 1050, while the sum is 23.

The square root of 65570 is about 256.0663976394. The cubic root of 65570 is about 40.3244446106.

The spelling of 65570 in words is "sixty-five thousand, five hundred seventy".