78866 has 8 divisors (see below), whose sum is σ = 120960. Its totient is φ = 38548.

The previous prime is 78857. The next prime is 78877. The reversal of 78866 is 66887.

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

It is an Ulam number.

It is a Curzon number.

It is a zygodrome in base 3.

It is an unprimeable number.

78866 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 326 + ... + 513.

It is an arithmetic number, because the mean of its divisors is an integer number (15120).

2⁷⁸⁸⁶⁶ is an apocalyptic number.

78866 is a deficient number, since it is larger than the sum of its proper divisors (42094).

78866 is a wasteful number, since it uses less digits than its factorization.

78866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 888.

The product of its digits is 16128, while the sum is 35.

The square root of 78866 is about 280.8309099797. The cubic root of 78866 is about 42.8841300925.

The spelling of 78866 in words is "seventy-eight thousand, eight hundred sixty-six".