677808809 has 8 divisors (see below), whose sum is σ = 697005120. Its totient is φ = 658658736.

The previous prime is 677808773. The next prime is 677808821. The reversal of 677808809 is 908808776.

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

It is a cyclic number.

It is not a de Polignac number, because 677808809 - 2²⁴ = 661031593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (677808839) 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 7 ways as a sum of consecutive naturals, for example, 19322 + ... + 41580.

It is an arithmetic number, because the mean of its divisors is an integer number (87125640).

Almost surely, 2^677808809 is an apocalyptic number.

It is an amenable number.

677808809 is a deficient number, since it is larger than the sum of its proper divisors (19196311).

677808809 is a wasteful number, since it uses less digits than its factorization.

677808809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23119.

The product of its (nonzero) digits is 1354752, while the sum is 53.

The square root of 677808809 is about 26034.7615506653. The cubic root of 677808809 is about 878.4203794813.

The spelling of 677808809 in words is "six hundred seventy-seven million, eight hundred eight thousand, eight hundred nine".