66867 has 8 divisors (see below), whose sum is σ = 92160. Its totient is φ = 43080.

The previous prime is 66863. The next prime is 66877. The reversal of 66867 is 76866.

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

It is not a de Polignac number, because 66867 - 2² = 66863 is a prime.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (66863) 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, 267 + ... + 452.

It is an arithmetic number, because the mean of its divisors is an integer number (11520).

2⁶⁶⁸⁶⁷ is an apocalyptic number.

66867 is a deficient number, since it is larger than the sum of its proper divisors (25293).

66867 is a wasteful number, since it uses less digits than its factorization.

66867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 753.

The product of its digits is 12096, while the sum is 33.

The square root of 66867 is about 258.5865425733. The cubic root of 66867 is about 40.5885882816.

Subtracting 66867 from its reverse (76866), we obtain a palindrome (9999).

The spelling of 66867 in words is "sixty-six thousand, eight hundred sixty-seven".