677355561 has 16 divisors (see below), whose sum is σ = 1012374720. Its totient is φ = 447572160.

The previous prime is 677355551. The next prime is 677355583. The reversal of 677355561 is 165553776.

677355561 is a `hidden beast` number, since 67 + 7 + 35 + 556 + 1 = 666.

It is not a de Polignac number, because 677355561 - 2⁷ = 677355433 is a prime.

It is a super-3 number, since 3×677355561³ (a number of 27 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (677355521) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 107955 + ... + 114056.

It is an arithmetic number, because the mean of its divisors is an integer number (63273420).

Almost surely, 2^677355561 is an apocalyptic number.

It is an amenable number.

677355561 is a deficient number, since it is larger than the sum of its proper divisors (335019159).

677355561 is a wasteful number, since it uses less digits than its factorization.

677355561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222133 (or 222127 counting only the distinct ones).

The product of its digits is 661500, while the sum is 45.

The square root of 677355561 is about 26026.0554252849. The cubic root of 677355561 is about 878.2245371074.

The spelling of 677355561 in words is "six hundred seventy-seven million, three hundred fifty-five thousand, five hundred sixty-one".