677965561 has 8 divisors (see below), whose sum is σ = 834419264. Its totient is φ = 536412240.

The previous prime is 677965523. The next prime is 677965579. The reversal of 677965561 is 165569776.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 677965561 - 2¹⁹ = 677441273 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 677965499 and 677965508.

It is not an unprimeable number, because it can be changed into a prime (677965591) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 3724995 + ... + 3725176.

It is an arithmetic number, because the mean of its divisors is an integer number (104302408).

Almost surely, 2^677965561 is an apocalyptic number.

It is an amenable number.

677965561 is a deficient number, since it is larger than the sum of its proper divisors (156453703).

677965561 is a wasteful number, since it uses less digits than its factorization.

677965561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7450191.

The product of its digits is 2381400, while the sum is 52.

The square root of 677965561 is about 26037.7718132716. The cubic root of 677965561 is about 878.4880895967.

The spelling of 677965561 in words is "six hundred seventy-seven million, nine hundred sixty-five thousand, five hundred sixty-one".