201678 has 8 divisors (see below), whose sum is σ = 403368. Its totient is φ = 67224.

The previous prime is 201673. The next prime is 201683. The reversal of 201678 is 876102.

201678 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (201673) and next prime (201683).

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

201678 is an admirable number.

It is a nialpdrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201673) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16801 + ... + 16812.

It is an arithmetic number, because the mean of its divisors is an integer number (50421).

2²⁰¹⁶⁷⁸ is an apocalyptic number.

201678 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.

201678 is a wasteful number, since it uses less digits than its factorization.

201678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33618.

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 201678 is about 449.0857379165. The cubic root of 201678 is about 58.6434495482.

The spelling of 201678 in words is "two hundred one thousand, six hundred seventy-eight".