677768009 has 4 divisors (see below), whose sum is σ = 679933716. Its totient is φ = 675602304.

The previous prime is 677767991. The next prime is 677768023. The reversal of 677768009 is 900867776.

677768009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1507984 + 676260025 = 1228^2 + 26005^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-677768009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (677768029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1082384 + ... + 1083009.

It is an arithmetic number, because the mean of its divisors is an integer number (169983429).

Almost surely, 2^677768009 is an apocalyptic number.

It is an amenable number.

677768009 is a deficient number, since it is larger than the sum of its proper divisors (2165707).

677768009 is a wasteful number, since it uses less digits than its factorization.

677768009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2165706.

The product of its (nonzero) digits is 889056, while the sum is 50.

The square root of 677768009 is about 26033.9779711054. The cubic root of 677768009 is about 878.4027539256.

The spelling of 677768009 in words is "six hundred seventy-seven million, seven hundred sixty-eight thousand, nine".