678295664 has 20 divisors (see below), whose sum is σ = 1326258120. Its totient is φ = 336035520.

The previous prime is 678295663. The next prime is 678295669. The reversal of 678295664 is 466592876.

678295664 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 (678295663) 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, 192722 + ... + 196209.

It is an arithmetic number, because the mean of its divisors is an integer number (66312906).

Almost surely, 2^678295664 is an apocalyptic number.

It is an amenable number.

678295664 is a deficient number, since it is larger than the sum of its proper divisors (647962456).

678295664 is a wasteful number, since it uses less digits than its factorization.

678295664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389048 (or 389042 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 53.

The square root of 678295664 is about 26044.1099675147. The cubic root of 678295664 is about 878.6306457566.

The spelling of 678295664 in words is "six hundred seventy-eight million, two hundred ninety-five thousand, six hundred sixty-four".