677780617 has 4 divisors (see below), whose sum is σ = 678924180. Its totient is φ = 676637056.

The previous prime is 677780591. The next prime is 677780641. The reversal of 677780617 is 716087776.

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 473976441 + 203804176 = 21771^2 + 14276^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-677780617 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (677780417) 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, 570892 + ... + 572077.

It is an arithmetic number, because the mean of its divisors is an integer number (169731045).

Almost surely, 2^677780617 is an apocalyptic number.

It is an amenable number.

677780617 is a deficient number, since it is larger than the sum of its proper divisors (1143563).

677780617 is a wasteful number, since it uses less digits than its factorization.

677780617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1143562.

The product of its (nonzero) digits is 691488, while the sum is 49.

The square root of 677780617 is about 26034.2201150716. The cubic root of 677780617 is about 878.4082006434.

The spelling of 677780617 in words is "six hundred seventy-seven million, seven hundred eighty thousand, six hundred seventeen".