677809766556 has 48 divisors (see below), whose sum is σ = 1892460320800. Its totient is φ = 208556850816.

The previous prime is 677809766483. The next prime is 677809766581. The reversal of 677809766556 is 655667908776.

677809766556 is a `hidden beast` number, since 6 + 7 + 7 + 8 + 0 + 9 + 7 + 66 + 556 = 666.

It is a super-2 number, since 2×677809766556² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 241383841 + ... + 241386648.

Almost surely, 2^677809766556 is an apocalyptic number.

It is an amenable number.

677809766556 is an abundant number, since it is smaller than the sum of its proper divisors (1214650554244).

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

677809766556 is a wasteful number, since it uses less digits than its factorization.

677809766556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 482770515 (or 482770507 counting only the distinct ones).

The product of its (nonzero) digits is 800150400, while the sum is 72.

The spelling of 677809766556 in words is "six hundred seventy-seven billion, eight hundred nine million, seven hundred sixty-six thousand, five hundred fifty-six".