678275664 has 120 divisors (see below), whose sum is σ = 1992893280. Its totient is φ = 198401280.

The previous prime is 678275651. The next prime is 678275723. The reversal of 678275664 is 466572876.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 166419 + ... + 170445.

It is an arithmetic number, because the mean of its divisors is an integer number (16607444).

Almost surely, 2^678275664 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 678275664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (996446640).

678275664 is an abundant number, since it is smaller than the sum of its proper divisors (1314617616).

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

678275664 is a wasteful number, since it uses less digits than its factorization.

678275664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4089 (or 4072 counting only the distinct ones).

The product of its digits is 3386880, while the sum is 51.

The square root of 678275664 is about 26043.7260007089. The cubic root of 678275664 is about 878.6220100016.

The spelling of 678275664 in words is "six hundred seventy-eight million, two hundred seventy-five thousand, six hundred sixty-four".