66188 has 6 divisors (see below), whose sum is σ = 115836. Its totient is φ = 33092.

The previous prime is 66179. The next prime is 66191. The reversal of 66188 is 88166.

It is a self number, because there is not a number n which added to its sum of digits gives 66188.

It is an unprimeable number.

66188 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 (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8270 + ... + 8277.

It is an arithmetic number, because the mean of its divisors is an integer number (19306).

2⁶⁶¹⁸⁸ is an apocalyptic number.

It is an amenable number.

66188 is a deficient number, since it is larger than the sum of its proper divisors (49648).

66188 is a wasteful number, since it uses less digits than its factorization.

66188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16551 (or 16549 counting only the distinct ones).

The product of its digits is 2304, while the sum is 29.

The square root of 66188 is about 257.2702858863. The cubic root of 66188 is about 40.4507352002.

It can be divided in two parts, 6 and 6188, that multiplied together give a triangular number (37128 = T₂₇₂).

The spelling of 66188 in words is "sixty-six thousand, one hundred eighty-eight".