677686564 has 6 divisors (see below), whose sum is σ = 1185951494. Its totient is φ = 338843280.

The previous prime is 677686549. The next prime is 677686571. The reversal of 677686564 is 465686776.

It can be written as a sum of positive squares in only one way, i.e., 675584064 + 2102500 = 25992^2 + 1450^2 .

It is a super-2 number, since 2×677686564² = 918518158052252192, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84710817 + ... + 84710824.

Almost surely, 2^677686564 is an apocalyptic number.

It is an amenable number.

677686564 is a deficient number, since it is larger than the sum of its proper divisors (508264930).

677686564 is a wasteful number, since it uses less digits than its factorization.

677686564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169421645 (or 169421643 counting only the distinct ones).

The product of its digits is 10160640, while the sum is 55.

The square root of 677686564 is about 26032.4137182859. The cubic root of 677686564 is about 878.3675676588.

It can be divided in two parts, 677 and 686564, that added together give a square (687241 = 829²).

The spelling of 677686564 in words is "six hundred seventy-seven million, six hundred eighty-six thousand, five hundred sixty-four".