66863 has 2 divisors, whose sum is σ = 66864. Its totient is φ = 66862.

The previous prime is 66853. The next prime is 66877. The reversal of 66863 is 36866.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66863 - 2¹⁰ = 65839 is a prime.

It is a d-powerful number, because it can be written as 6 + 6 + 8³ + 6⁶ + 3⁹ .

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33431 + 33432.

It is an arithmetic number, because the mean of its divisors is an integer number (33432).

2⁶⁶⁸⁶³ is an apocalyptic number.

66863 is a deficient number, since it is larger than the sum of its proper divisors (1).

66863 is an equidigital number, since it uses as much as digits as its factorization.

66863 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 29.

The square root of 66863 is about 258.5788081031. The cubic root of 66863 is about 40.5877789258.

It can be divided in two parts, 66 and 863, that added together give a palindrome (929).

The spelling of 66863 in words is "sixty-six thousand, eight hundred sixty-three".