66854 has 4 divisors (see below), whose sum is σ = 100284. Its totient is φ = 33426.

The previous prime is 66853. The next prime is 66863. The reversal of 66854 is 45866.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16712 + ... + 16715.

It is an arithmetic number, because the mean of its divisors is an integer number (25071).

2⁶⁶⁸⁵⁴ is an apocalyptic number.

66854 is a deficient number, since it is larger than the sum of its proper divisors (33430).

66854 is a wasteful number, since it uses less digits than its factorization.

66854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33429.

The product of its digits is 5760, while the sum is 29.

The square root of 66854 is about 258.5614046992. The cubic root of 66854 is about 40.5859577571.

The spelling of 66854 in words is "sixty-six thousand, eight hundred fifty-four".