678667164 has 96 divisors (see below), whose sum is σ = 1953745920. Its totient is φ = 179063808.

The previous prime is 678667163. The next prime is 678667201. The reversal of 678667164 is 461766876.

678667164 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678667163) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 49972 + ... + 62084.

It is an arithmetic number, because the mean of its divisors is an integer number (20351520).

Almost surely, 2^678667164 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 678667164, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (976872960).

678667164 is an abundant number, since it is smaller than the sum of its proper divisors (1275078756).

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

678667164 is a wasteful number, since it uses less digits than its factorization.

678667164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12179 (or 12177 counting only the distinct ones).

The product of its digits is 2032128, while the sum is 51.

The square root of 678667164 is about 26051.2411220656. The cubic root of 678667164 is about 878.7910240542.

The spelling of 678667164 in words is "six hundred seventy-eight million, six hundred sixty-seven thousand, one hundred sixty-four".