677655709 has 4 divisors (see below), whose sum is σ = 679126140. Its totient is φ = 676185280.

The previous prime is 677655679. The next prime is 677655733. The reversal of 677655709 is 907556776.

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 234763684 + 442892025 = 15322^2 + 21045^2 .

It is a cyclic number.

It is not a de Polignac number, because 677655709 - 2¹⁷ = 677524637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (677653709) 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 3 ways as a sum of consecutive naturals, for example, 734524 + ... + 735445.

It is an arithmetic number, because the mean of its divisors is an integer number (169781535).

Almost surely, 2^677655709 is an apocalyptic number.

It is an amenable number.

677655709 is a deficient number, since it is larger than the sum of its proper divisors (1470431).

677655709 is a wasteful number, since it uses less digits than its factorization.

677655709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1470430.

The product of its (nonzero) digits is 2778300, while the sum is 52.

The square root of 677655709 is about 26031.8210849721. The cubic root of 677655709 is about 878.3542367946.

The spelling of 677655709 in words is "six hundred seventy-seven million, six hundred fifty-five thousand, seven hundred nine".