678316564 has 6 divisors (see below), whose sum is σ = 1187053994. Its totient is φ = 339158280.

The previous prime is 678316547. The next prime is 678316577. The reversal of 678316564 is 465613876.

It can be written as a sum of positive squares in only one way, i.e., 392436100 + 285880464 = 19810^2 + 16908^2 .

It is a super-2 number, since 2×678316564² = 920226721993532192, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84789567 + ... + 84789574.

Almost surely, 2^678316564 is an apocalyptic number.

It is an amenable number.

678316564 is a deficient number, since it is larger than the sum of its proper divisors (508737430).

678316564 is a wasteful number, since it uses less digits than its factorization.

678316564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169579145 (or 169579143 counting only the distinct ones).

The product of its digits is 725760, while the sum is 46.

The square root of 678316564 is about 26044.5112067783. The cubic root of 678316564 is about 878.6396699393.

The spelling of 678316564 in words is "six hundred seventy-eight million, three hundred sixteen thousand, five hundred sixty-four".