66270 has 24 divisors (see below), whose sum is σ = 162504. Its totient is φ = 17296.

The previous prime is 66239. The next prime is 66271. The reversal of 66270 is 7266.

Added to its reverse (7266) it gives a triangular number (73536 = T₃₈₃).

It is a hoax number, since the sum of its digits (21) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

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 66270.

It is not an unprimeable number, because it can be changed into a prime (66271) by changing a digit.

66270 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1387 + ... + 1433.

It is an arithmetic number, because the mean of its divisors is an integer number (6771).

2⁶⁶²⁷⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66270, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81252).

66270 is an abundant number, since it is smaller than the sum of its proper divisors (96234).

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

66270 is a wasteful number, since it uses less digits than its factorization.

66270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104 (or 57 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 21.

The square root of 66270 is about 257.4296020274. The cubic root of 66270 is about 40.4674330480.

Adding to 66270 its reverse (7266), we get a triangular number (73536 = T₃₈₃).

The spelling of 66270 in words is "sixty-six thousand, two hundred seventy".