677128257 has 48 divisors (see below), whose sum is σ = 1134701568. Its totient is φ = 385672320.

The previous prime is 677128183. The next prime is 677128259. The reversal of 677128257 is 752821776.

It is not a de Polignac number, because 677128257 - 2¹¹ = 677126209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (677128259) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 79363 + ... + 87479.

It is an arithmetic number, because the mean of its divisors is an integer number (23639616).

Almost surely, 2^677128257 is an apocalyptic number.

It is an amenable number.

677128257 is a deficient number, since it is larger than the sum of its proper divisors (457573311).

677128257 is a wasteful number, since it uses less digits than its factorization.

677128257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8190 (or 8187 counting only the distinct ones).

The product of its digits is 329280, while the sum is 45.

The square root of 677128257 is about 26021.6882042653. The cubic root of 677128257 is about 878.1262892075.

The spelling of 677128257 in words is "six hundred seventy-seven million, one hundred twenty-eight thousand, two hundred fifty-seven".