65870 has 16 divisors (see below), whose sum is σ = 135648. Its totient is φ = 22560.

The previous prime is 65867. The next prime is 65881. The reversal of 65870 is 7856.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 65870.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 401 + ... + 540.

It is an arithmetic number, because the mean of its divisors is an integer number (8478).

2⁶⁵⁸⁷⁰ is an apocalyptic number.

65870 is an abundant number, since it is smaller than the sum of its proper divisors (69778).

It is a weird number, because it is abundant, but not a pseudoperfect number.

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67824).

65870 is a wasteful number, since it uses less digits than its factorization.

65870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 955.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 65870 is about 256.6515147043. The cubic root of 65870 is about 40.3858493721.

The spelling of 65870 in words is "sixty-five thousand, eight hundred seventy".