66955 has 8 divisors (see below), whose sum is σ = 91872. Its totient is φ = 45888.

The previous prime is 66949. The next prime is 66959. The reversal of 66955 is 55966.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 66955 - 2³ = 66947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66959) by changing a digit.

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, 922 + ... + 991.

It is an arithmetic number, because the mean of its divisors is an integer number (11484).

2⁶⁶⁹⁵⁵ is an apocalyptic number.

66955 is a deficient number, since it is larger than the sum of its proper divisors (24917).

66955 is a wasteful number, since it uses less digits than its factorization.

66955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1925.

The product of its digits is 8100, while the sum is 31.

The square root of 66955 is about 258.7566424268. The cubic root of 66955 is about 40.6063859498.

The spelling of 66955 in words is "sixty-six thousand, nine hundred fifty-five".