49866 has 8 divisors (see below), whose sum is σ = 99744. Its totient is φ = 16620.

The previous prime is 49853. The next prime is 49871. The reversal of 49866 is 66894.

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

49866 is an admirable number.

It is a Curzon number.

It is a nialpdrome in base 15.

It is an unprimeable number.

49866 is an untouchable number, because it is not equal to the sum of proper divisors of any 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 3 ways as a sum of consecutive naturals, for example, 4150 + ... + 4161.

It is an arithmetic number, because the mean of its divisors is an integer number (12468).

2⁴⁹⁸⁶⁶ is an apocalyptic number.

49866 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49872).

49866 is a wasteful number, since it uses less digits than its factorization.

49866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8316.

The product of its digits is 10368, while the sum is 33.

The square root of 49866 is about 223.3069636173. The cubic root of 49866 is about 36.8073748610.

It can be divided in two parts, 4 and 9866, that added together give a triangular number (9870 = T₁₄₀).

The spelling of 49866 in words is "forty-nine thousand, eight hundred sixty-six".