66155 has 8 divisors (see below), whose sum is σ = 80784. Its totient is φ = 52000.

The previous prime is 66137. The next prime is 66161. The reversal of 66155 is 55166.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 66155 - 2⁸ = 65899 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66155.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 440 + ... + 570.

It is an arithmetic number, because the mean of its divisors is an integer number (10098).

2⁶⁶¹⁵⁵ is an apocalyptic number.

66155 is a deficient number, since it is larger than the sum of its proper divisors (14629).

66155 is a wasteful number, since it uses less digits than its factorization.

66155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237.

The product of its digits is 900, while the sum is 23.

The square root of 66155 is about 257.2061430060. The cubic root of 66155 is about 40.4440114428. Note that the first 3 decimals are identical.

The spelling of 66155 in words is "sixty-six thousand, one hundred fifty-five".