677559649 has 4 divisors (see below), whose sum is σ = 729679636. Its totient is φ = 625439664.

The previous prime is 677559637. The next prime is 677559671. The reversal of 677559649 is 946955776.

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 456591424 + 220968225 = 21368^2 + 14865^2 .

It is a cyclic number.

It is not a de Polignac number, because 677559649 - 2⁷ = 677559521 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 677559593 and 677559602.

It is not an unprimeable number, because it can be changed into a prime (677559629) 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, 26059974 + ... + 26059999.

It is an arithmetic number, because the mean of its divisors is an integer number (182419909).

Almost surely, 2^677559649 is an apocalyptic number.

It is an amenable number.

677559649 is a deficient number, since it is larger than the sum of its proper divisors (52119987).

677559649 is a wasteful number, since it uses less digits than its factorization.

677559649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52119986.

The product of its digits is 14288400, while the sum is 58.

The square root of 677559649 is about 26029.9759700235. The cubic root of 677559649 is about 878.3127316005.

The spelling of 677559649 in words is "six hundred seventy-seven million, five hundred fifty-nine thousand, six hundred forty-nine".