978166 has 16 divisors (see below), whose sum is σ = 1694880. Its totient is φ = 414720.

The previous prime is 978157. The next prime is 978179. The reversal of 978166 is 661879.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1206 + ... + 1846.

It is an arithmetic number, because the mean of its divisors is an integer number (105930).

2⁹⁷⁸¹⁶⁶ is an apocalyptic number.

978166 is a deficient number, since it is larger than the sum of its proper divisors (716714).

978166 is a wasteful number, since it uses less digits than its factorization.

978166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 759.

The product of its digits is 18144, while the sum is 37.

The square root of 978166 is about 989.0227499911. The cubic root of 978166 is about 99.2668378694.

It can be divided in two parts, 9781 and 66, that multiplied together give a palindrome (645546).

The spelling of 978166 in words is "nine hundred seventy-eight thousand, one hundred sixty-six".